#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^7;
sbit wela=P2^6;
uchar num[] = {1, 2, 3, 4, 5, 6, 7, 8};
uchar code table[] = {
    0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
    0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

void delayms()
{
    uchar i, j;
    for(i = 150; i > 0; i--) for(j = 150; j > 0; j--);
}
void display()
{
    uchar i, wei = 1;
    for(i = 0; i < 8; i++) {
      P0 = ~table[num[i]];  dula = 1;  dula = 0;
      P0 = wei;  wela = 1;  wela = 0;
      wei *= 2;    delayms();
      P0 = 0;  wela = 1;  wela = 0;
    }
}

void main()
{
    while(1)  {
      display();
    }
}