Cop Light Effect on an Arri Skypanel S60. How to set this up?

Hello. I saw a programmer do this on a Road Hog. I have trying like crazy to do the same, without true success. The major obstacle is the color not "snapping" from red to blue and the back to red. There is always a magenta in between.

Also when I saw this, the programmer split the S60 into two halves. It would be great to know how this is done as well. Please help.