I/O output port illumination LED

Scenario Features: I/O output port illumination LEDs. And the interval is 0.2 seconds flashing! ( non-timer delay )
(P1.0 pin is connected to LED)

LED EQU P1. 0   ; macro definitionORG0000H ljmp MAIN ORG0200HMAIN:Setb LED; not bright        PagerDELAY; delay 0.2 seconds        CLRLed; Bright        PagerDELAY; delay 0.2 secondsAJMP MAINDELAY:  MOV  -H#200, time-lapse subroutine, timed 0.2 secondsdelayms:MOV   theH#20Delaya: MOV  WuyiH#20DJNZWuyih,$ DJNZ theH,delaya DJNZ -H,delaymsRETEND

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I/O output port illumination LED