How to trigger animations in a script using character controller ?

Trying to create controls for a 2D platformer using character controller ! I created animations inside my FBX model, separated them in unity and am now trying to script them to activate and blend. The idle and the run seem to be working fine, it's the process of jumping that is giving me a hard time. My jump animation is separated is 3 (jump, fall, land). I just can't make the script work to activate the land animation when the character touches the ground. I also can't figure out how to make him return to his idle animation after the land animation...