void setup() {
  // put your setup code here, to run once:
  pinMode(12, OUTPUT); 
  pinMode(3, OUTPUT);  
  pinMode(1, OUTPUT);  
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(12, HIGH);
delay(3000);
digitalWrite(12, LOW);
delay(500);

digitalWrite(3, HIGH);
delay(1000);
digitalWrite(3, LOW);
delay(500);

digitalWrite(1, HIGH);
delay(5000);
digitalWrite(1, LOW);
delay(500);

digitalWrite(3, HIGH);
delay(1000);
digitalWrite(3, LOW);
delay(500);
}