2D animations via script help

I´m new on this 2D tools. So i need help how to use animation via script to control in single sprite sheet animations.
In this case, to manipulate that frames for each, of walk, jump, attack.
Is hard to find in the documentations the what is for 2D or not

How i manipulate that specific frames for each animations in single sprite sheet?

*Green-Walk.
*Blue-jump.
*Red-Attack.

 

any???