text: // Task: 
  // 1. Select all spans
  // 2. Iterate over them
  // 3. Assign them each one of the array colors
  
  const colors = ['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet']; 
  
  const letters = document.querySelectorAll('span');
  for (let i = 0; i < letters.length; i++) {
      letters[i].style.color = colors[i];
  }