ORG 0H
MAIN:
	CLR  P1.0			
	CLR  P1.1			
	CLR  P1.2			
	CLR  P1.3			
	SETB P2.7
MONITOR:
	JNB  P2.7, CLOCKWISE
	SETB P1.0			
	CLR  P1.1			
	CLR  P1.2			
	SETB P1.3			
	SJMP MONITOR
CLOCKWISE:
	CLR  P1.0			
	SETB P1.1			
	SETB P1.2			
	CLR  P1.3			
	SJMP MONITOR
	END