	    ORG 0000H
	    LJMP MAIN
	    ORG 00030H
MAIN:	MOV TMOD,#60H
	    MOV TH1,#0F6H
	    MOV TL1,#0F6H
        MOV A,#00H
	    MOV IE,#88H
	    SETB TR1
	    MOV P1,#00H
	    ACALL DEL
LOOP:	JBC TF1,LOOP1
      	AJMP LOOP
LOOP1:	INC A
	    MOV P1,A
	    ACALL DEL
	    AJMP LOOP
DEL: 	MOV R7,#014H
DEL1:	MOV R6,#0FFH
DEL2:   MOV R5,#01FH
DEL3:	DJNZ R5,DEL3
	    DJNZ R6,DEL2
	    DJNZ R7,DEL1
	RET
	    END
