Figured out finally how to put more than one gif in the box at a time a few days ago...The Back Arrow is Aces for that!
Great! You'll keep *learning* new html the more you experiment. If you want a graphic *on top of* another one, and to make sure both are *centered*, you type the center command <center>, then the first graphic, then a <br>, and the the graphic you want underneath. You do the same if you want text above or below a graphic. Just make sure you use the <br> instead of the <p> command, because a <p> usually strips the <center> command here. (Two <br>s are the same thing as one <p>)