void setup() 
{
  pinMode(13, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop()
 {
   digitalWrite(10,1); 
   delay(1000);
   digitalWrite(10,0);
   delay(1000);
   digitalWrite(9,1);
   delay(2000);
   digitalWrite(9,0);
   delay(2000);
   digitalWrite(5,1);
   delay(1000);
   digitalWrite(5,0);
   delay(1000);
   digitalWrite(13,1);
   delay(2000);
   digitalWrite(13,0);
   delay(2000);
 }