"Dim lights" on scene

[kmkm]

Hello,

I'm pretty new to both vizard, python, and programming in general, so any help is greatly appreciated.

I'm creating a task in which the user starts in the center of an invisible torus and had to walk until he collides with the inside edge. On this collision, I need the lights in the scene to dim and text to come up across the screen. Is there a way to do this? Let me know if what I'm asking is unclear.

Thanks!