think of a sprite as if it were a TV.
Every time you change the channel, you get to see a new pictures (story or movie etc...)
Just make a sprite and fill it with a red colour.
Then add a frame (Animation window) and fill that frame with blue.
You can add a third frame and fill that with green.
Then play your app.
You should see the colours flicker and then stop.
There are a few ways to manipulate "how" that animation plays but for the purpose of making a C2 game,
you want to read up on "set frame"
So every time you click on "something" you can display any frame of the sprite. Just specify the number.
The first frame has the number 0, the second frame is 1 and so forth.
Just try it. You will figure it out in no time.