#include <REG52.H>                   
void Delay(unsigned int DelayTime )     
  { if( DelayTime == 0 )return;     
      while( DelayTime != 0) 
  { DelayTime--;}     
} 
 
void mian()       
  { data unsigned char LedBuff;     
    
       for(;;)             
   { LedBuff = 0X01; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X02; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X04; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X08; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X10; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X20; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X40; P1 = LedBuff;  
  Delay(100000);     
    LedBuff = 0X80; P1 = LedBuff;  
  Delay(100000);     
} 
}