how to make a character animation?

I'm trying to make this platformer game and I want the player to do an animation when the player is not moving after the animation is finished or if you move while it's playing then you will go back to the normal idle animation if you don't know what I mean then I want to achieve something like the sonic waiting animation when you be idle for some time. I don't know lots of scripting much so I thought someone here could help me with creating this.

sorry if bad grammar