#include <reg52.h>
void delay(unsigned int t){
    while(t--){
    unsigned char i;
        for(i=0;i<125;i++);
    }
}

unsigned char j;
unsigned char a[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
void main(){
    while(1){
      for(j=0;j<8;j++){
          P1=a[j];
        delay(250);
      }
      }
    }