Program a string of 128ct rgb nodes so that ch1 turns 1st and every 4th pixel red, ch2 turns same pixels green, ch3 turns same pixels blue, THEN channel 4 turns 2nd pixel and every 4th red, etc and then channel 7 turns 3rd pixel red, etc. I am trying to do pixel chases of 4 (rgb) channels (12). Brain is fried. Thought I had it figured out with groups but I don't think I did it right. THANKS IN ADVANCE!