Touch collided objects, animation continues

Hi,

In this game, there is a feature, i can do the 1st part, cannot do the 2nd part, please help.

1st part: a yellow circle animating from left to right by itself. user clicks button to control when the red circle animating from top to down. if red/yellow collide, they both stop. complete program in attached zip. problem2.zip (188 Bytes)

2nd part: This part i cannot do, please help. if user touches the red/yellow circles, then they are released to continue the original animation. Thanks