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| function closeCouplet(coupletId) { let couplet = document.getElementById(coupletId); couplet.style.visibility = 'hidden'; }
let intervalId;
startInterval();
function startInterval() { intervalId = setInterval(down, 1); }
function down() { let down = document.getElementById('couplet-down'); let style = window.getComputedStyle(down); down.style.display = 'flex'; let top = parseInt(style.getPropertyValue("top"));
if (top > 320) { down.style.top = (top - 0.1) + "px"; } else { clearInterval(intervalId); } }
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