About costom walking animation, keeps on going?

so i have used a free model script by jt(something) to handle diffrent walking,running,jumping and other stuff. i got it to work but the problem is that if i stop running/walking the animation wont stop. it will just finish the animation and then stop, how do i prevent that? can someone plz help me?

in the animation editor delete the last frame or change it to look the same as the first one. you can also go to Edit > Loop > True.