void setup()  
{  
  pinMode(13, OUTPUT);  
  pinMode(4, OUTPUT);  
  pinMode(3, OUTPUT);  
}  
void loop()  
{   
  for( int i = 0; i < 8; i = i +1 )  
  {
    digitalWrite(13, HIGH);  
    delay(500); 
    digitalWrite(13, LOW);  
    delay(200); 
  }
  for( int i = 0; i < 8; i = i +1 )  
  {
    digitalWrite(4, HIGH);  
    delay(500);   
    digitalWrite(4, LOW);  
    delay(200);    
  }
    for( int i = 0; i < 10; i = i +1 )
  { 
    digitalWrite(3, HIGH);  
    delay(500);   
    digitalWrite(3, LOW);  
    delay(200);  
  }
}