The wide screen came from the code I had posted to show what you had done wrong. You had ran the two URLs for the two pictures together.
You need to be sure that when you highlight the URLs that you have no blank spaces between the first or last letter of the URL and the IMG tag in square brackets.
Hang in there you'll catch on. In a few months you'll be asking George to teach you HTML....then you will get confused, simple for him, way over my head.