JSでDVDのロゴが動くやつ作ってみた - Qiita

* { box-sizing: border-box; } body { margin: 0; } # container { width: 500px; height: 500px; background-color: black; #box { font-size: 44px; transition: transform 1s linear 0s; } } // 色の文字列を格納した配列 const colors = ["red", "blue", "yellow", "green"]; // boxのHTML要素 const box = document.getElementById("box"); // boxのwidth(数値) const boxWidth: number = Number(box.style.width.replace("px", "")); // conta