*Guy with wildlife degree gets on soap box*
I actually got out my notes on mammalian locomotion to answer this. I'm such a nerd. By the way, I'm taking you literally when you say the monkey is walking, so if he's actually moving with any sort of speed, throw this post out the window.
If you want to be completely accurate to a true monkey walk, the solution is probably way more complicated than you want to get for a brickfilm. In actuality, most smaller animals don't move any of their legs simultaneously. Diagonally-opposite legs are moved at about the same time, but the movement of the front leg is a fraction of a second before that of the rear. For example, the animal will move its right front and left rear legs at about the same time, but the right front will already be in the air before the left rear is picked up, and already on the ground before the left rear is put down. See diagram:
All of this having been said, I think you're a lot better off going for the stereotypical monkey, having it run, and just make random movements, as Hazzat suggested.
Last edited by Noodle (March 14, 2010 (11:06am))
With all due respect Noodle, I don't want you here. - Ratboy Productions