<div class="title">60 fps:</div>
<div class="div green" id="div1"></div>

<div class="title">30 fps:</div>
<div class="div red" id="div2"></div>

<div class="title">10 fps:</div>
<div class="div blue" id="div3"></div>
body {
  padding: 20px;
}
.div {
    width: 30px;
    height: 20px;
    position: relative;
}

.green {
    background-color: green;
}

.red {
    background-color: red;
}

.blue {
    background-color: blue;
}
function moveDiv(div, fps) {
    var left = 0;
    var param = 1;
    function loop () {
        update();
        draw();
    }
    function update() {
        left += param * 2;
        if (left > 300) {
            left = 300;
            param = -1;
        } else if (left < 0) {
            left = 0;
            param = 1;
        }
    }
    function draw() {
        div.style.left = left + "px";
    }
    setInterval(loop, 1000 / fps);
}

moveDiv(document.getElementById("div1"), 60);
moveDiv(document.getElementById("div2"), 30);
moveDiv(document.getElementById("div3"), 10);

External CSS

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External JavaScript

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