int redPin=12;
int greenPin2=10;
int yellowPin3=11;


void setup() {
  // put your setup code here, to run once:
pinMode(redPin, OUTPUT);
pinMode(greenPin2 , OUTPUT);
pinMode(yellowPin3 , OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(redPin, HIGH);
delay(4000);

digitalWrite(greenPin2, HIGH);
delay(4000);

digitalWrite(yellowPin3, HIGH);
delay(2000);

}