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diff --git a/src/index.jsx b/src/index.jsx
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+/**
+ * Mousey Index
+ * @module src/index.jsx
+ */
+
+import { initializeDOM } from "./utility/index.js";
+
+// We will build 100 elements
+let elementCount = 100;
+
+// Keep track of current element offset
+let currentIndex = 0;
+
+// Set when we're done
+let almostDone = 0;
+
+// Append a bunch of elements
+let elements = [];
+
+// Keep track of coordinates
+let coordinates = [];
+
+/**
+ * Start the application and bind events
+ */
+function initialize() {
+  initializeDOM();
+  makeElements();
+  window.addEventListener("mousemove", handleMouseMove);
+  window.addEventListener("click", handleClick);
+  animate();
+}
+
+/**
+ * Animate the divs
+ */
+function animate(time) {
+  requestAnimationFrame(animate);
+  updateElements(time);
+}
+
+/**
+ * Update one element
+ */
+function updateElement({ element, coordinate, percent, time }) {
+  // Slow down time!
+  time /= 100;
+
+  // Set the color, size, and position
+  let hue = Math.round((percent * 360 + time) % 360);
+  let size = (Math.cos(percent * 10 + time / 30) + 1 / 2) * 50;
+
+  let xpos = coordinate.pageX + Math.sin(percent + time / 30) * 20;
+  let ypos = coordinate.pageY + Math.cos(percent + time / 30) * 20;
+
+  // Update the element
+  element.style.width = size + "px";
+  element.style.height = size + "px";
+  element.style.left = xpos + "px";
+  element.style.top = ypos + "px";
+  element.style.background = `hsl(${hue}deg 100% 50%)`;
+}
+
+/**
+ * Update the current element positions
+ */
+function updateElements(time) {
+  // Loop over all the elements
+  for (let index = 0; index < coordinates.length; index += 1) {
+    // Get the element index offset by the current index
+    let elementIndex =
+      (index - currentIndex + coordinates.length) % coordinates.length;
+
+    // Get the next DIV and update it
+    let element = elements[elementIndex];
+    let coordinate = coordinates[elementIndex];
+
+    // Convert the index to a value between 0..1
+    let percent = elementIndex / elementCount;
+
+    updateElement({ element, coordinate, percent, time });
+  }
+}
+
+function handleClick() {
+  almostDone = 0;
+}
+
+/**
+ * Handle when we click on the page
+ */
+function handleMouseMove(event) {
+  // Get the mouse coordinates
+  const { pageX, pageY } = event;
+  appendCoordinate({ pageX, pageY });
+}
+
+/**
+ * Append a coordinate to the rotating list
+ */
+function appendCoordinate({ pageX, pageY }) {
+  if (almostDone > elementCount) return;
+  coordinates[currentIndex] = { pageX, pageY };
+  currentIndex = (currentIndex + 1) % elementCount;
+  almostDone += 1;
+}
+
+/**
+ * Make a bunch of DOM elements
+ */
+function makeElements() {
+  for (let index = 0; index < elementCount; index++) {
+    let element = makeElement();
+    elements.push(element);
+  }
+}
+
+/**
+ * Make a DOM element
+ */
+function makeElement() {
+  let element = document.createElement("div");
+  element.style.position = "absolute";
+  element.style.transform = "translate3d(-50%, -50%, 0)";
+  document.body.appendChild(element);
+  return element;
+}
+
+// Run the application
+initialize();