Color changes on Flat Panel

I have been trying to figure out how to do color changes so I could create more patterns. I played with a 2 color change to get the hang of it. I hope the pictures help since I am not good explaining it lol. Here is what I have come up with :

Front view (for easier flow of colors, leave out the purl stitches):


How to drop one color (blue) and pick up the next (white) crossing in the back (note: make sure first color [blue here] is in FRONT of the next color [white] before continuing to wrap)



Continuation of wrapping second color (white), blue will pick back up on next row)