title: Could you help me Explain what this means?
body: <p>Hello again guys i have recently found this code on another forum that i made the only problem that i am having is trying to explain what the code actually means </p>
  
  <pre><code>  var list=["Red.jpg","Amber.jpg","Green.jpg","AmberLast.jpg"];
    var index = 0;
  
    function changeLights() {
      var image = document.getElementById('Red.jpg');
      var display = document.getElementById('display');
      index = (index + 1) % 4;
      image.src = list[index];
      display.innerHTML = list[index]
  </code></pre>
  
  <p>Thanks For your help guys i hope i can hear your answers soon </p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;body&gt;
  &lt;h1&gt;Traffic Light Sequence&lt;/h1&gt;
  
  &lt;img id="Red.jpg" src="Red.jpg"&gt;
  
  &lt;button type="button" onclick="changeLights()"&gt;Change Lights&lt;/button&gt;
  
  &lt;script&gt;
    var list=["Red.jpg","Amber.jpg","Green.jpg","AmberLast.jpg"];
    var index = 0;
  
    function changeLights() {
      var image = document.getElementById('Red.jpg');
      var display = document.getElementById('display');
      index = (index + 1) % 4;
      image.src = list[index];
      display.innerHTML = list[index];
  
    }
  &lt;/script&gt;
  
  &lt;/body&gt;
  &lt;/html&gt; 
  </code></pre>
  
  <p>Here is my entire code</p>