I know the XP bar is divided into thirds. Each third you get an AP, and when the bar fills you get an SP and the bar then goes back to the beginning, and each time it does, the amount of XP needed to fill up again, I presume becomes a little longer. I also the see the bar with two colors. Brown and blue. The blue portion will always extend x-amount further than the brown portion. I haven't yet figured out exactly how that part works yet. What does the blue portion stand for? Does it signify progress toward the next third of the bar, and when you fill up one third, that third turns brown? Or is it something else?