//Define pins for LEDs
const int redLED = 8;
const int yellowLED = 9;
const int greenLED = 10;

//Define delays (in milliseconds)
const int redDelay = 5000; //Red light duration (5 seconds)
const int yellowdelay = 2000; //Yellow light duration (2 seconds)
const int greenDelay = 5000; // Green light duration (5 seconds)

void setup() {
//set LED pins as output
pinMode(redLED, OUTPUT);
pinMode(yellowLED, OUTPUT);
pinMode(greenLED, OUTPUT);

}

void loop() {
  //Red light on
  digitalWrite(redLED, HIGH);
  digitalWrite(yellowLED,LOW);
  digitalWrite(greenLED, LOW);
  delay(redDelay);

  //Yellow light on
  digitalWrite(redLED,LOW);
  digitalWrite(yellowLED,HIGH);
  digitalWrite(greenLED,LOW);
  delay(yellowdelay);

  //Green light on
  digitalWrite(redLED,LOW);
  digitalWrite(yellowLED,LOW);
  digitalWrite(greenLED,HIGH);
  delay(greenDelay);

}