text: var myHeading = document.querySelector('h2');
  var myButton = document.querySelector('button');
  
  myHeading.textContent = 'Hello world Test!';
  document.querySelector('h3').textContent = multiply(5,6);
  
  myButton.onclick = function() {
    setUserName();
  }
  
  if(!localStorage.getItem('name')) {
    setUserName();
  } else {
    var storedName = localStorage.getItem('name');
    myHeading.textContent = 'Mozilla is cool, ' + storedName;
  }
  
  
  //alert('Yay, I love chocolate ice cream!'); 
  var myImage = document.querySelector('img');
  
  myImage.onclick = function() {
      var mySrc = myImage.getAttribute('src');
      if(mySrc === 'images/firefox-icon.png') {
        myImage.setAttribute ('src','images/eagle.png');
      } else {
        myImage.setAttribute ('src','images/firefox-icon.png');
      }
  }
  
  function setUserName() {
    var myName = prompt('Please enter your name.');
    localStorage.setItem('name', myName);
    myHeading.textContent = 'Hello world Test!, ' + myName;
  }
  
  function multiply(num1,num2) {
    var result = num1 * num2;
    return result;
  }