for(t2 = 0; t2 <= an-1; t2++) {
  for(t4 = 0; t4 <= bm-1; t4++) {
    s0(t2,t4,0);
  }
}
for(t2 = 0; t2 <= 4*an-4; t2 += 4) {
  for(t4 = 0; t4 <= 4*bm-4; t4 += 4) {
    for(t6 = 0; t6 <= ambn-1; t6++) {
      s1(t2/4,t4/4,t6);
    }
  }
}