unit              106 walls.c          int unit,lline;
unit              109 walls.c            unit = ((count+i) / UNITLINES) % WALLLOOP; 
unit              112 walls.c              putdata(j,lines-i,walldata[wallorder[unit]*UNITLINES+lline][j],
unit              113 walls.c                      collisioncheckdata[wallorder[unit]*UNITLINES+lline][j]);