your pictures are upside down for some reason - but as for the back, do you have the ability to set the flash patterns? If so, I highly recommend flashing all the red lights together, then all the amber lights. Why do you want the blue in there? If you must have blue, then you're going to have to flash mixed colors at some point which I never recommend. I'd just use red and amber if you can.
For the front, pretty much the same thing - I see the ION grille lights you have red/white which I'm assuming are split lightheads. Another thing I don't recommend. Get 2 white and 2 red IONs and put them in an X pattern. Flash both red then both white. get rid of the split 900s up top too. Make is so it is like this - R/W/R/W/R/W/R - all solid color 900s and flash all red then all white. if you're able to make those changes then you'll be set. If you have split modules on the sides I would ditch those too. Use solid color modules.