ORG 0H
MAIN:
	SETB P1.0
	MOV R5, #55
	ACALL DELAY
	CLR P1.0
	MOV R5, #55
	ACALL DELAY
	SJMP MAIN
DELAY:
H1:	MOV R4,#100
H2:	MOV R3,#253
H3:	DJNZ R3, H3
	DJNZ R4, H2
	DJNZ R5, H1
	RET
	END