void setup() {
  // put your setup code here, to run once:
pinMode (12, OUTPUT);
pinMode (11, OUTPUT);
pinMode (10, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite (12, HIGH);
delay(250);
digitalWrite (10, HIGH);
delay(250);

digitalWrite (12, LOW);
delay(350);
digitalWrite (10, LOW);
delay(325);

digitalWrite (12, HIGH);
delay(250);
digitalWrite (11, HIGH);
delay(350);
digitalWrite (10, HIGH);
delay(450);

digitalWrite (11, LOW);
delay(250);
}