Is there a certain code I need to put gifs on my web page. I tried <img src but is doesn't work

nope.
just have the image file stored online like your webpage and put in the correct coding.
<img src="imagenamehere.gif">

I mean my animation gifs. The <img src code doesn't work for them.

animated gifs are the same as regular gifs when it comes to uploading and coding them.

Just try copy and pasting the code that pb&j wrote. Images don't usually appear when you just type the code by yourself.