Conversion value bidding

<div class="value-bid"><div class="head">SAME CHANCE · DIFFERENT VALUE</div><div class="option" id="a"><span>ORDER A</span><b id="av">$40</b><i></i></div><div class="option" id="b"><span>ORDER B</span><b id="bv">$80</b><i></i></div><div class="note" id="winner">PRIORITY → B</div></div>

.value-bid{width:min(88%,480px);font:700 clamp(10px,max(2vmin,1vw),16px)/1.2 sans-serif}.head{padding:6px 0;border-bottom:2px solid var(--fg);letter-spacing:.07em}.option{display:grid;grid-template-columns:1fr auto;gap:5px;background:var(--surface);border:2px solid var(--line);padding:clamp(7px,1.7vmin,14px);margin-top:clamp(6px,1.5vmin,12px);transition:.35s}.option b{font-size:clamp(15px,4vmin,28px)}.option i{grid-column:1/-1;height:clamp(6px,1.5vmin,10px);width:40%;background:var(--accent);transition:width .45s}.option.on{border-color:var(--accent);box-shadow:4px 4px 0 var(--accent-3)}.note{margin-top:clamp(7px,2vmin,15px);color:var(--accent);font-size:clamp(12px,3vmin,22px)}

let step=0;const cases=[[40,80],[90,60],[50,100]];function draw(){const [a,b]=cases[step++%3];document.querySelector('#av').textContent='$'+a;document.querySelector('#bv').textContent='$'+b;document.querySelector('#a i').style.width=a+'%';document.querySelector('#b i').style.width=b+'%';document.querySelector('#a').classList.toggle('on',a>b);document.querySelector('#b').classList.toggle('on',b>a);document.querySelector('#winner').textContent='PRIORITY → '+(a>b?'A':'B')}draw();setInterval(draw,1400);