Part 1. Clears everything ACLS each background layer DIM BG0[16383] DIM BG1[16383] DIM BG2[16383] DIM BG3[16383] loads each layer LOAD "DAT:SC_MAP_L0",BG0,0 LOAD "DAT:SC_MAP_L1",BG1,0 LOAD "DAT:SC_MAP_L2",BG2,0 LOAD "DAT:SC_MAP_L3",BG3,0