MOV	A,#55		;A=55H
	MOV	R3,#10		;R3=10, THE OUTER LOOP COUNT
NEXT:	MOV	R2,#70		;R2=70, THE INNER LOOP COUNT
AGAIN:	CPL	A		;COMPLEMENT A REGISTER
	DJNZ	R2,AGAIN	;REPEAT IT 70 TIMES (INNER LOOP)
	DJNZ	R3,NEXT