#include "reg51.h"
//#include <at89x51.h>

bit lightoff = 1;
bit lighton = 0;
sbit P1_0 = P1^0;
sbit P1_1 = P1^1;
sbit P1_2 = P1^2;
sbit P1_3 = P1^3;
sbit P1_4 = P1^4;
sbit P1_5 = P1^5;
sbit P1_6 = P1^6;
sbit P1_7 = P1^7;
void delay_1500ms();

int main () {
  P1 = 0xFF;
  while (1) {
    delay_1500ms();
    
    P1_0 = lighton;
    delay_1500ms();
    
    P1_1 = lighton;
    delay_1500ms();
    
    P1_2 = lighton;
    delay_1500ms();
    
    P1_3 = lighton;
    delay_1500ms();
    
    P1_4 = lighton;
    delay_1500ms();
    
    P1_5 = lighton;
    delay_1500ms();
    
    P1_6 = lighton;
    delay_1500ms();
    
    P1_7 = lighton;
    delay_1500ms();
    
    P1_7 = lightoff;
    delay_1500ms();
    
    P1_6 = lightoff;
    delay_1500ms();
    
    P1_5 = lightoff;
    delay_1500ms();
    
    P1_4 = lightoff;
    delay_1500ms();
    
    P1_3 = lightoff;
    delay_1500ms();
    
    P1_2 = lightoff;
    delay_1500ms();
    
    P1_1 = lightoff;
    delay_1500ms();
    
    P1_0 = lightoff;
  }  // end of while(1)
}  // end of main()

void delay_1500ms() {
  unsigned short kk;
  for (kk = 0; kk < 33000; kk++);
}