Night Garden Starfield Journey Effect
Complete the starfield traversal effect for a night garden scenario: includes real content, actionable controls, clear status feedback, and responsive layouts across sizes.
With JavaScript enabled, you can edit, run, and save this example. The fixed source is as follows:
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<title>Night Garden Starfield Journey Effect</title>
<style>
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@media (max-width:700px) { .mast h1 { line-height:1.08 !important; letter-spacing:-.035em !important; overflow-wrap:anywhere; } }
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { scroll-behavior:auto !important; animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; } }
.page{width:min(1140px,calc(100% - 28px));margin:auto;padding:54px 0}.mast{display:flex;justify-content:space-between;align-items:center;gap:24px;margin:0 12px 28px}.mast h1{font-family:"Hiragino Maru Gothic ProN","PingFang SC",sans-serif;font-weight:900;font-size:clamp(38px,8vw,82px);letter-spacing:-.035em;margin:0;line-height:.98}.eyebrow{display:inline-flex;padding:7px 12px;border-radius:999px;color:var(--paper);background:var(--accent);font-weight:900}.intro{max-width:620px;line-height:1.65}.scenario{padding:12px 18px;border-radius:999px;background:var(--secondary);box-shadow:0 7px 0 color-mix(in srgb,var(--ink) 18%,transparent);font-weight:900}.demo{border-radius:46px 18px 46px 18px;box-shadow:0 18px 0 color-mix(in srgb,var(--secondary) 45%,transparent);position:relative;min-height:390px;overflow:hidden;padding:clamp(22px,5vw,54px);background:color-mix(in srgb,var(--paper) 90%,#fff)}@media(max-width:700px){.mast{display:grid}.page{width:calc(100% - 16px);padding:18px 0}.demo{padding:17px}}
.panel{padding:30px;border:0;border-radius:42px 12px;background:color-mix(in srgb,var(--secondary) 18%,var(--paper))}.row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}.stack{display:flex;flex-direction:column;gap:20px}.action{min-height:48px;padding:12px 22px;border:0;border-radius:50% 50% 18px 18px;background:color-mix(in srgb,var(--secondary) 42%,transparent);font-weight:800}.action.primary,.action.is-active{color:var(--paper);background:var(--accent)}.muted{color:color-mix(in srgb,var(--ink) 64%,transparent);line-height:1.7}.status{min-height:25px;margin-top:16px;color:var(--accent)}.metric{font-size:clamp(32px,7vw,66px);font-weight:800}.meter{height:11px;border-radius:50%;background:color-mix(in srgb,var(--ink) 10%,transparent)}.meter>i{display:block;height:100%;border-radius:inherit;background:var(--accent)}.chip{padding:8px 12px;border-radius:50%;background:var(--paper)}
.composition-gallery{margin:0;padding:clamp(8px,2vw,18px);border:1px solid var(--ink);background:color-mix(in srgb,var(--paper) 78%,transparent)}.gallery-caption{display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding:15px 4px 2px;font-size:12px}.gallery-caption::before,.gallery-caption::after{content:"";height:1px;background:var(--line)}.gallery-caption strong{font:800 11px/1.2 ui-monospace,monospace;letter-spacing:.16em;text-transform:uppercase}.composition-gallery .demo{box-shadow:none}.composition-gallery .demo::before{content:"";position:absolute;inset:10px;border:1px dashed color-mix(in srgb,var(--accent) 36%,transparent);pointer-events:none}
.starfield-lab{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(220px,.6fr);gap:16px}.starfield-lab canvas{width:100%;height:460px;border:1px solid var(--line);border-radius:24px;background:#02040a}.star-controls{display:grid;align-content:center;gap:17px}.star-controls label{display:grid;grid-template-columns:1fr auto;gap:8px;font-weight:800}.star-controls input{grid-column:1/-1}@media(max-width:740px){.starfield-lab{grid-template-columns:1fr}.starfield-lab canvas{height:330px}}.workflow-session{display:grid;gap:14px}.session-command{display:grid;grid-template-columns:1fr auto minmax(170px,.45fr) auto;gap:16px;align-items:end;padding:18px;border-block:4px double var(--ink)}.session-command h2{margin:.2em 0}.session-command output{font:900 clamp(28px,5vw,54px)/1 ui-monospace,monospace}.session-command label{display:grid;grid-template-columns:1fr auto;gap:7px;font-size:12px}.session-command input{grid-column:1/-1;width:100%}#workflowSessionProgress{height:12px;overflow:hidden;border-radius:2px;background:var(--line)}#workflowSessionProgress i{display:block;width:0;height:100%;background:var(--accent)}.session-stage{min-width:0;transition:filter .25s,transform .25s}.session-stage[data-session-phase="running"]{transform:translateY(-3px)}.session-stage[data-session-phase="paused"]{filter:grayscale(.65)}.session-stage[data-session-phase="complete"]{filter:contrast(.78);opacity:.72}.session-log{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start}.session-log ol{display:flex;flex-wrap:wrap;gap:7px;padding:0;margin:0;list-style:none}.session-log li{padding:5px 8px;border:1px solid var(--line);font-size:12px}@media(max-width:900px){.session-stage{order:-1}.session-command{grid-template-columns:1fr auto}.session-command label{grid-column:1/-1}.session-log{grid-template-columns:1fr}}
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<body data-aesthetic="playful" data-composition="gallery-frame">
<main class="page">
<header class="mast"><div><span class="eyebrow">playful / Starfield Traversal Effect / INTERMEDIATE</span><h1>Night Garden Starfield Journey Effect</h1><p class="intro">Complete the starfield traversal effect for a night garden scenario: includes real content, actionable controls, clear status feedback, and responsive layouts across sizes.</p></div><span class="scenario">Night Garden</span></header>
<figure class="composition-gallery"><section class="demo" aria-label="Night Garden Starfield Journey Interactive Area"><div class="workflow-session"><header class="session-command"><div><span class="eyebrow">Night Garden SESSION</span><h2>Garden Observation Timing Station</h2></div><output id="workflowSessionClock">00:45</output><label>Round Duration<input id="workflowSessionLength" type="range" min="15" max="90" step="15" value="45"><span>sec</span></label><button id="workflowSessionToggle" class="action primary" type="button">Start monitoring</button></header><div id="workflowSessionProgress" role="progressbar" aria-label="Garden Observation Progress" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><i></i></div><section id="workflowCore" class="workflow-core session-stage" data-session-phase="ready" tabindex="-1"><!-- 11DZ_CORE_START:creative-effects-starfield --><div class="starfield-lab"><canvas id="starCanvas" width="960" height="480" aria-label="Night Garden starfield travel animation" aria-describedby="starHelp">Your browser does not support Canvas.</canvas><aside class="star-controls panel"><span class="eyebrow">STARFIELD</span><h2>Starfield traversal effect</h2><p id="starHelp" class="muted">The stars move outward from the center of the screen, with size and brightness conveying depth and distance.</p><label>shuttle speed <input id="starSpeed" type="range" min="1" max="12" value="5" data-core-bridge="creative-effects-starfield"><output id="starSpeedValue">5</output></label><label>Star Count <input id="starAmount" type="range" min="40" max="180" value="110"><output id="starAmountValue">110</output></label><div class="row"><button id="starReset" class="action primary" type="button">Reset course</button><button id="starPause" class="action" type="button" aria-pressed="false">Pause</button></div></aside></div><!-- 11DZ_CORE_END --></section><footer class="session-log"><strong id="workflowSessionScore">0 interaction checkpoints</strong><ol id="workflowSessionLaps" aria-label="Round Log"></ol></footer></div><p id="status" class="status" role="status" aria-live="polite"></p></section><figcaption class="gallery-caption"><strong>Night Garden / GALLERY 03</strong></figcaption></figure>
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<script>
'use strict';
const statusOutput = document.querySelector('#status');
const announce = message => { statusOutput.textContent = message; };
/* 11DZ_CORE_SCRIPT_START:creative-effects-starfield */
const starCanvas=document.querySelector('#starCanvas');const starContext=starCanvas.getContext('2d');const starSpeed=document.querySelector('#starSpeed');const starAmount=document.querySelector('#starAmount');const starReduced=matchMedia('(prefers-reduced-motion: reduce)').matches;let stars=[];let starPaused=starReduced;let starFrame=0;function sizeStarCanvas(){const rect=starCanvas.getBoundingClientRect();const ratio=Math.min(2,devicePixelRatio||1);starCanvas.width=Math.max(320,Math.round(rect.width*ratio));starCanvas.height=Math.max(260,Math.round(rect.height*ratio));starContext.setTransform(ratio,0,0,ratio,0,0);}function createStars(){cancelAnimationFrame(starFrame);const rect=starCanvas.getBoundingClientRect();stars=Array.from({length:Number(starAmount.value)},(_,index)=>({x:((index*73)%997)/997*rect.width-rect.width/2,y:((index*151)%991)/991*rect.height-rect.height/2,z:40+(index*61)%900,pz:900}));document.querySelector('#starAmountValue').textContent=starAmount.value;announce('Starfield generated '+stars.length+' stars');}function drawStars(){const rect=starCanvas.getBoundingClientRect();const centerX=rect.width/2;const centerY=rect.height/2;starContext.fillStyle='#02040a';starContext.fillRect(0,0,rect.width,rect.height);stars.forEach((star,index)=>{star.pz=star.z;if(!starPaused)star.z-=Number(starSpeed.value);if(star.z<8){star.z=900;star.pz=900;}const x=centerX+star.x/star.z*280;const y=centerY+star.y/star.z*280;const previousX=centerX+star.x/star.pz*280;const previousY=centerY+star.y/star.pz*280;const radius=Math.max(.5,(1-star.z/900)*3.4);starContext.beginPath();starContext.strokeStyle=index%5?'rgba(255,255,255,.84)':'rgba(125,211,252,.94)';starContext.lineWidth=radius;starContext.moveTo(previousX,previousY);starContext.lineTo(x,y);starContext.stroke();});if(!starPaused)starFrame=requestAnimationFrame(drawStars);}starSpeed.addEventListener('input',()=>{document.querySelector('#starSpeedValue').textContent=starSpeed.value;announce('shuttle speed '+starSpeed.value);});starAmount.addEventListener('input',()=>{createStars();drawStars();});document.querySelector('#starReset').addEventListener('click',()=>{createStars();drawStars();});document.querySelector('#starPause').addEventListener('click',event=>{starPaused=!starPaused;event.currentTarget.textContent=starPaused?'Continue':'Pause';event.currentTarget.setAttribute('aria-pressed',String(starPaused));cancelAnimationFrame(starFrame);drawStars();announce(starPaused?'Starfield traversal paused':'Continue Starfield Journey');});addEventListener('resize',()=>{sizeStarCanvas();createStars();drawStars();},{passive:true});sizeStarCanvas();createStars();drawStars();
/* 11DZ_CORE_SCRIPT_END */
const workflowBridgeSpec={"name":"creative-effects-starfield","selector":"[data-core-bridge=\"creative-effects-starfield\"]","mode":"range","key":"ArrowRight"};const workflowBridgeCore=document.querySelector('#workflowCore');const workflowBridgeControl=workflowBridgeCore.querySelector(workflowBridgeSpec.selector);if(!workflowBridgeControl)throw new Error('Missing core bridge: '+workflowBridgeSpec.name);const workflowBridgeControlledId=workflowBridgeControl.getAttribute('aria-controls');const workflowBridgeControlled=workflowBridgeControlledId?document.getElementById(workflowBridgeControlledId):null;workflowBridgeCore.dataset.workflowBridge=workflowBridgeSpec.name;workflowBridgeCore.dataset.workflowVersion='0';function workflowBridgeSerialize(){const visualNode=workflowBridgeCore.firstElementChild||workflowBridgeCore;const visual=getComputedStyle(visualNode);const outputs=[...workflowBridgeCore.querySelectorAll('output,[role="status"],[aria-live],meter,progress')].map(node=>node.textContent.trim()+'|'+node.getAttribute('aria-valuenow')+'|'+node.getAttribute('value'));const canvas=[...workflowBridgeCore.querySelectorAll('canvas')].map(node=>{try{return node.toDataURL().slice(-160);}catch{return 'canvas-unavailable';}});return JSON.stringify({html:workflowBridgeCore.innerHTML,status:statusOutput.textContent,outputs,canvas,visual:[visual.display,visual.visibility,visual.opacity,visual.transform,visual.filter,visual.backgroundColor,visual.width,visual.height],scroll:workflowBridgeSpec.mode==='scroll'?workflowBridgeControl.scrollTop:null});}let workflowBridgeLastEffect=workflowBridgeSerialize();function workflowBridgeSummary(){const label=(workflowBridgeControl.getAttribute('aria-label')||workflowBridgeControl.textContent||workflowBridgeControl.value||workflowBridgeSpec.name).trim().replace(/\s+/g,' ').slice(0,72);return label+' · Core Version '+workflowBridgeCore.dataset.workflowVersion;}function workflowBridgeCommit(){const effect=workflowBridgeSerialize();if(effect===workflowBridgeLastEffect)return {changed:false,summary:workflowBridgeSummary()};workflowBridgeLastEffect=effect;workflowBridgeCore.dataset.workflowVersion=String(Number(workflowBridgeCore.dataset.workflowVersion||0)+1);return {changed:true,summary:workflowBridgeSummary()};}function workflowBridgeScheduleCommit(){queueMicrotask(workflowBridgeCommit);setTimeout(workflowBridgeCommit,0);}workflowBridgeControl.addEventListener("input",workflowBridgeScheduleCommit);workflowBridgeControl.addEventListener('change',workflowBridgeScheduleCommit);const workflowBridgeStateTargets=new Set(workflowBridgeCore.querySelectorAll('dialog'));if(workflowBridgeControlled&&workflowBridgeCore.contains(workflowBridgeControlled))workflowBridgeStateTargets.add(workflowBridgeControlled);workflowBridgeStateTargets.forEach(target=>['close','cancel','toggle'].forEach(eventName=>target.addEventListener(eventName,workflowBridgeScheduleCommit)));function workflowBridgeActivate(){workflowBridgeControl.focus();const step=Number(workflowBridgeControl.step)||1;const min=workflowBridgeControl.min===''?-Infinity:Number(workflowBridgeControl.min);const max=workflowBridgeControl.max===''?Infinity:Number(workflowBridgeControl.max);let next=Math.min(max,Math.max(min,(Number(workflowBridgeControl.value)||0)+step));if(next===Number(workflowBridgeControl.value))next=Math.max(min,Number(workflowBridgeControl.value)-step);workflowBridgeControl.value=String(next);workflowBridgeControl.dispatchEvent(new Event('input',{bubbles:true}));workflowBridgeControl.dispatchEvent(new Event('change',{bubbles:true}));const result=workflowBridgeCommit();setTimeout(workflowBridgeCommit,0);return result;}function workflowBridgeReset(){workflowBridgeCore.dataset.workflowVersion='0';workflowBridgeLastEffect=workflowBridgeSerialize();}
const workflowSessionCore=document.querySelector('#workflowCore');const workflowSessionToggle=document.querySelector('#workflowSessionToggle');const workflowSessionLength=document.querySelector('#workflowSessionLength');const workflowSessionState={phase:'ready',elapsed:0,limit:Number(workflowSessionLength.value),checkpoints:[],timer:null};function workflowSessionFormat(seconds){return String(Math.floor(seconds/60)).padStart(2,'0')+':'+String(seconds%60).padStart(2,'0');}function workflowSessionDrive(){const percent=Math.min(100,Math.round(workflowSessionState.elapsed/workflowSessionState.limit*100));document.querySelector('#workflowSessionClock').textContent=workflowSessionFormat(Math.max(0,workflowSessionState.limit-workflowSessionState.elapsed));const progress=document.querySelector('#workflowSessionProgress');progress.setAttribute('aria-valuenow',String(percent));progress.querySelector('i').style.width=percent+'%';workflowSessionCore.dataset.sessionPhase=workflowSessionState.phase;document.querySelector('#workflowSessionScore').textContent=workflowSessionState.checkpoints.length+' interactive checkpoints';}function workflowSessionLap(label){workflowSessionState.checkpoints.push({label,at:workflowSessionState.elapsed});const item=document.createElement('li');item.textContent=label+' · '+workflowSessionFormat(workflowSessionState.elapsed);document.querySelector('#workflowSessionLaps').append(item);workflowSessionDrive();}function workflowSessionStop(complete=false){clearInterval(workflowSessionState.timer);workflowSessionState.timer=null;workflowSessionState.phase=complete?'complete':'paused';workflowSessionToggle.textContent=complete?'Restart':'Continue round';workflowSessionToggle.setAttribute('aria-pressed','false');workflowSessionDrive();announce(complete?'Garden Observation Round Complete':'Round paused');}function workflowSessionStart(){if(workflowSessionState.phase==='complete'){workflowSessionState.elapsed=0;workflowSessionState.checkpoints=[];document.querySelector('#workflowSessionLaps').replaceChildren();}workflowSessionState.phase='running';workflowSessionToggle.textContent='Pause round';workflowSessionToggle.setAttribute('aria-pressed','true');const bridge=workflowBridgeActivate();workflowSessionLap(bridge.summary);clearInterval(workflowSessionState.timer);workflowSessionState.timer=setInterval(()=>{workflowSessionState.elapsed+=1;if(workflowSessionState.elapsed>=workflowSessionState.limit){workflowSessionStop(true);return;}workflowSessionDrive();},1000);workflowSessionDrive();announce('Garden observation round has started · '+bridge.summary);}workflowSessionToggle.addEventListener('click',()=>workflowSessionState.phase==='running'?workflowSessionStop():workflowSessionStart());workflowSessionLength.addEventListener('input',()=>{workflowSessionState.limit=Number(workflowSessionLength.value);workflowSessionState.elapsed=Math.min(workflowSessionState.elapsed,workflowSessionState.limit);workflowSessionDrive();});workflowSessionCore.addEventListener('keydown',event=>{if(event.key==='Enter'||event.key===' '){workflowSessionLap('Keyboard Interaction');}});workflowSessionCore.addEventListener('click',event=>{if(event.target.closest('[data-core-bridge]'))workflowSessionLap('Core action · '+workflowBridgeSummary());});document.addEventListener('visibilitychange',()=>{if(document.hidden&&workflowSessionState.phase==='running')workflowSessionStop();});workflowSessionDrive();
workflowBridgeReset();
</script>
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