Move html elements in circular path

// Write a script that creates 5 div elements and moves them in circular path with interval of 100 milliseconds

     (function () {
    'use strict';
    var container = document.getElementById('container');
        var documentFragment = document.createDocumentFragment();
        var circleRadius = 150;
        var centerX = 300;
        var centerY = 300;
        var divCount = 5;
        var angleSizeInDegrees = 360 / divCount;
        var angleInDegrees = angleSizeInDegrees;
        var angleInRadians = angleInDegrees * Math.PI / 180.0;
        var startingAnglesInDegrees = new Array(divCount);

        for (var index = 0; index < divCount; index++) {
            var newDiv = document.createElement('div');

            newDiv.style.width = "50px";
            newDiv.style.height = "50px";
            newDiv.style.position = 'absolute';
            startingAnglesInDegrees[index] = angleInDegrees;
            newDiv.style.top = circleRadius * Math.cos(angleInRadians) + centerX + "px";
            newDiv.style.left = circleRadius * Math.sin(angleInRadians) + centerY + "px";
            newDiv.style.backgroundColor = "rgb(" + generateRandom(1, 255) + ", " +
                        generateRandom(1, 255) + ", " + generateRandom(1, 255) + ")";
            documentFragment.appendChild(newDiv);
            angleInDegrees += angleSizeInDegrees;
            angleInRadians = angleInDegrees * Math.PI / 180.0;
        }

        container.appendChild(documentFragment);

        // lets move
        var divSet = document.getElementsByTagName('div');
        window.setInterval(moveDivs, 100);

        function moveDivs() {
            for (var index = 0; index < divSet.length; index++) {

                startingAnglesInDegrees[index]++;
                if (startingAnglesInDegrees[index] > 360) {
                    startingAnglesInDegrees[index] = 0;
                }

                angleInRadians = startingAnglesInDegrees[index] * Math.PI / 180.0;

                divSet[index].style.top = (circleRadius * Math.cos(angleInRadians) + centerX) + "px";
                divSet[index].style.left = (circleRadius * Math.sin(angleInRadians) + centerY) + "px";
            }
        }

        function generateRandom(start, end) {
            return Math.floor(Math.random() * (end - start) + start + 1);
        }
     })();