<!DOCTYPE HTML>
<html>
<head>
    <style>
        div {
            width: 100px;
            height: 100px;
            margin: 10px;
            display: inline-block;
        }
    </style>
<head>
<body>
<script>
    function createDiv(color) {
        var divElement = document.createElement("div");
        divElement.style.backgroundColor = color;
        document.body.appendChild(divElement);
    }

    createDiv("red");
    createDiv("green");
    createDiv("blue");
</script>
</body>
</html>