int ledRed = 13;
int ledYellow = 12;
int ledGreen = 11;

void setup() {
  // put your setup code here, to run once:
pinMode(ledRed, OUTPUT);
pinMode(ledYellow, OUTPUT);
pinMode(ledGreen, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(ledRed, HIGH);
delay (3000);
digitalWrite(ledRed, LOW);
delay (200);
digitalWrite(ledYellow, HIGH);
delay (1000);
digitalWrite(ledYellow, LOW);
delay (200);
digitalWrite(ledGreen, HIGH);
delay (2000);
digitalWrite(ledGreen, LOW);
delay (200);
digitalWrite(ledYellow, HIGH);
delay (1000);
digitalWrite(ledYellow, LOW);
delay (200);
}