Arduino Intersection Light

ArduinoIntersectionLight.ino

int ledRed = 2;
int ledYellow = 3;
int ledGreen = 4;
int signalIn = 12;
int signalOut = 11;
int signalValue = 0;
int del = 2000;

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

void loop() {
  signalValue = digitalRead(signalIn);
  if (signalValue == 1) {
    sequence();
    signalValue = 0;
  }
  delay(10);
}

void sequence() {
  orange();
  green();
  yellow();
  notify();
  red();
}

void notify() {
  digitalWrite(signalOut, HIGH);
  delay(100);
  digitalWrite(signalOut, LOW);
}

void red() {
  digitalWrite(ledRed, HIGH); // sets the digital pin 7 on
  //delay(del);              // waits for a second
  //digitalWrite(ledRed, LOW);  // sets the digital pin 7 off
}

void orange() {
  digitalWrite(ledYellow, HIGH); // sets the digital pin 7 on
  digitalWrite(ledRed, HIGH);
  delay(del);              // waits for a second
  digitalWrite(ledYellow, LOW);  // sets the digital pin 7 off
  digitalWrite(ledRed, LOW);
}

void green() {
  digitalWrite(ledGreen, HIGH); // sets the digital pin 7 on
  delay(del);              // waits for a second
  digitalWrite(ledGreen, LOW);  // sets the digital pin 7 off
}

void yellow() {
  digitalWrite(ledYellow, HIGH); // sets the digital pin 7 on
  delay(del);              // waits for a second
  digitalWrite(ledYellow, LOW);  // sets the digital pin 7 off
}