#define Delay_ms  (500)     
#define Bitwiss   (1)       
#define PDPinMax (8)        
#define PDPinMin (0)        
char blink = 0;            
void setup(void) 
{
  DDRD = 0XFF;          
}
void loop(void) 
{

  blink = 0x01;

  for(int i = PDPinMin; i<PDPinMax ;i++)
  {
    PORTD = blink;          
    delay(Delay_ms);       
    blink <<= Bitwiss;     
  }
  blink = 0x40;
  for(int i = PDPinMax; i>PDPinMin ;i--)
  {
    PORTD = blink;          
    delay(Delay_ms);        
    blink >>= Bitwiss;       
  }
  char PortonD[PDPinMax] ={PORTD7,PORTD6,PORTD5,PORTD4,PORTD3,PORTD2,PORTD1,PORTD0};

  for(int i = PDPinMin ;i<PDPinMax ;i++)
  {
    PORTD |= Bitwiss << PortonD[i];          
    delay(Delay_ms);        
    PORTD &= ~(Bitwiss << PortonD[i]);  
  }


}