void setup() {
  // put your setup code here, to run once:
pinMode(8, OUTPUT);
pinMode(4, OUTPUT);
pinMode(3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(8,1);
delay(10);
digitalWrite(8,0);
delay(10);
digitalWrite(4,1);
delay(100);
digitalWrite(4,0);
delay(100);
digitalWrite(3,1);
delay(100);
digitalWrite(3,0);
delay(100);
}