Very Simple Traffic Light Simulation With Arduino!

Script.ino

//My Traffic Light Simulation With Arduino

void setup()
{
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop()
{
  digitalWrite(11, LOW);
  digitalWrite(9, HIGH);
  delay(2000); // Wait for 2000 millisecond(s)
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
  delay(2000); // Wait for 2000 millisecond(s)
  digitalWrite(10, LOW);
  digitalWrite(11, HIGH);
  delay(2000); // Wait for 2000 millisecond(s)
  digitalWrite(11, LOW);
}