Complex sentence: Drake and Josh try many ways to make the other give up, until finally, they both give up, whereupon they both dye their hair pink, as well as their parents', as they had bet on who would give up first.
Split into simpler sentences: Drake and Josh try many ways to make the other give up. Until finally, they both give up, whereupon they both dye their hair pink, as well as their parent's, as they had bet on who would give up first.