16,16 cell size
8 frames per row
128 frames

still[down]: 0,1,2,3
still[left]: 8,9,10,11
still[right]: 16,17,18,19
still[up]: 24,25,26,27
walk[down]: 32,33,34,35
walk[left]: 40,41,42,43
walk[right]: 48,49,50,51
walk[up]: 56,57,58,59