M_DELAY MACRO
        mov r0,#00h			;
	mov r1,#00h			;
	djnz r1,$			;
	djnz r0,$-4			;


Main:	setb P1.0			; Led on
	M_DELAY		                ; 
	clr P1.0			; Led off
	M_DELAY		                ; 
	jmp Main			;


	end