Making grass move as you step over it

[Demolition]

So I've set up grass with 4 frames of animation to it. What I've done is start frame with animation stopped, when the player collides with the grass object it starts one loop of the animation. What I can't figure out is how to stop it after that and restart it so I can "step" on it again else the animation only happens the first time you "step" over it.

THANKS!

[Shabadage]

Animation of grass is over + Movement speed of Character > 0 + Character overlapping grass - Start Animation or Set animation frame to 1