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Create two embedded CSS classes:
- Class .green has a color of green
- Class .orange has a background-color of orange
Add some event listeners to the ordered list above:
- Click on first list item: copy the text form this list item to the h1 tag
- Mouse enters the second item: add the class .orange to the h1 tag
  Mouse leaves the second item: remove the class .orange from the h1 tag
- Double-click the third item: toggle the class .green to the h1 tag
- Click on the button inside the last item: rotate the h1 tag by 180 degrees
  Double-click the button: rotate the h1 tag back to 0 degrees

// Basic DOM manipulation