#include"reg51.h"

#define led P1

void delay(unsigned int);

void ledl();

void ledr();

main(){

led=0xfe;

while(1){

ledl();

ledr();

}

}

void ledl(){

int i;

for(i=0;i<7;i++){ p="">

delay(100);

led=(led<<1)|0x01; p="">

}

}

void ledr(){

int i;

for(i=0;i<7;i++){ p="">

delay(100);

led=(led>>1)|0x80;

}

}

void delay(unsigned int t){

int i,j;

for(i=0;i

for(j=0;j<500;j++){ p="">

}

}

}