Is there a way to clear a layer?
For example; I have a projectile that spawns a trail every millisecond on a specific layer.
A second projectile can be launched using the first trail as a reference.
When the second projectile hits a target, the first trail disappears but leaves the second trail up.
It cycles for third projectile, fourth, fifth, etc.
Think of the Angry Birds.
The only thing I can think of is having alternating layers, where they alternatively get wiped clean for re-use.
Any idea of how to do this? Or am I going about this wrong?