CZ:=VALUEWHEN(CROSS(A,B),H-L);
AA:=CZ/4;
DRAWSL(CROSS(A,B),L,0,1,0,COLORYELLOW);
DRAWSL(CROSS(A,B),L+AA,0,1,0,COLORYELLOW);
DRAWSL(CROSS(A,B),L+2*AA,0,1,0,COLORYELLOW);
DRAWSL(CROSS(A,B),L+3*AA,0,1,0,COLORYELLOW);
DRAWSL(CROSS(A,B),L+4*AA,0,1,0,COLORYELLOW);