Okay, I'm back with more questions 
To prevent any wiring changes required in the car, Id like to make this work so that it finishes any animation sequence before returning to "off" mode
This should still be instantly interrupted by a change of display.
I was thinking, because I'm using an actual "blank" (all black) array as "off" the change need to be in here?
Thanks, I've got the prototypes in the car and they look great! Ready to advance to a more production level soon.