Thanks for response. Sorry,It should be like this?.
Code:
while(my.skill1>0){
		ent_animate(my,"Take",my.skill1,0);
 	  	my.skill1 -= time_step*7;
 	  	wait(1);
 		}

but it do the same thing as the code above. How can I reverse the animation smoothly?.Am I doing it wrong again?.