OK! I got it, thanks a lot George!!!

but I have another silly question!!
How to make the red bar(the power) moves
back and forth, back and forth, back....... while I press the left button.
This make the player have more times to decide how strong the power to kick the ball.

and one more , how to make the ball can move to another level when it touch entity (not defined by height)

I will be pleased if you can answer my question, because I wanna make the minigolf game badly, and seriously. But I don't have much skills on scripting, so You Are The Only Hope!!!

sample script will be very helpfull

Thanks.