Collision Detection STOOL

What I need is something that, when you click on an entity, will color any entities that collide with it that color (EX If I spawn a prop, and use this on it with a color of 0,255,0, anything it collides with but world will be colored lime green - when I press a “clear colors” function, it resets them to their original color).

I’m sure this is possible, and would be extremely grateful if someone could post one!

It would be alot simplier to make it color what it doesn’t collide with.