ArduinoBasics - 1. Traffic Lights Code

int redPin = 11;
int orangePin = 10;
int greenPin = 9;

void setup()
{
  pinMode(redPin, OUTPUT);
  pinMode(orangePin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop()
{
  // I will open the LED serially
  // 1st "red" will be HIGH for some seconds, then "orange"
  // for a little time and then "green"
  // Step 1
  digitalWrite(redPin, HIGH);
  digitalWrite(orangePin, LOW);
  digitalWrite(greenPin, LOW);
  delay(3000);
  // Step 2
  digitalWrite(redPin, LOW);
  digitalWrite(orangePin, HIGH);
  digitalWrite(greenPin, LOW);
  delay(1000);
  // Step 1
  digitalWrite(redPin, LOW);
  digitalWrite(orangePin, LOW);
  digitalWrite(greenPin, HIGH);
  delay(2000);
}