How do I create a illusion of distance

I intend to create a game like circus game: shoot balls in the clown's mouth. For this I need to create the illusion of distance between throw the ball (larger ball) and the arrival to the target (smaller ball). I think it would be right to use lerp to create this animation and maybe I need to simulate physics to show the ball falling. I need some ideas. Thank you.

Assuming you are shooting from bottom of the screen to the top.

You can decrement the Size of the Ball as the Y Axis changes....

Example:

[quote:20qmfwhs]

Every Tick:

Ball.Y=Ball.Y - 1

Ball.Scale = Ball.Scale - Ball.Y

The above is just the pseudo code. You might have to translate it into Construct 2 formulas.

Thanks SamRock

Actually the target is about the same hight of the throw. I think I need to do a kind of parable: a ball is thrown rises slightly and then falls, while decreasing in size.