I do something very similar to JonB256
I have two 120 second test sequences that I put in a test play list.
First one is 30sec Red, 30sec Green, 30 sec Blue, 30 sec White. This lets me see if all my colors are correct.
Second on is Red,Green,Blue,Blank bars moving to Right for 30 seconds the moving up for 30 seconds. This lets me see if props are hooked up in the right order.