#include <REG51.H>
#define uchar unsigned char	
#define uint unsigned int
sfr WDT=0xa6;
#define reset() {WDT=0x1e;WDT=0xe1;}
/*****************************************/
#define D0_ON 0xfe
#define D1_ON 0xfd
#define D2_ON 0xfb
#define D3_ON 0xf7
#define D4_ON 0xef
#define D5_ON 0xdf
#define D6_ON 0xbf
#define D7_ON 0x7f		
//*****************************************

void delay(uint k)		
{				
uint data i,j;		
	for(i=0;i<k;i++)
	{			
	for(j=0;j<121;j++){;}		
	}			
}	
//**************************************
void main(void)				
{	
	reset()
    while(1)	
    {				
	P1=D0_ON;		
	delay(3);
	P1=D1_ON;		
	delay(3);
	P1=D2_ON;		
	delay(3);
	P1=D3_ON;		
	delay(3);
	P1=D4_ON;		
	delay(3);
	P1=D5_ON;		
	delay(3);
	P1=D6_ON;		
	delay(3);
	P1=D7_ON;		
	delay(3);
    }					
}