/*
 * Two way Traffic Lights - Damien Kee 2020
 * 2 sets of traffic lights (Green, Yellow, Red). One facing North, the other facing west
 * Traffic lights change through a sequence to ensure no crashes
 * LED's have a 330 ohm resistor in series to limit the current.
 */

int north_red = 8;
int north_yellow = 9;
int north_green = 10;
int west_red = 11;
int west_yellow = 12;
int west_green = 13;

void setup() {
  pinMode(north_red, OUTPUT);
  pinMode(north_yellow, OUTPUT);
  pinMode(north_green, OUTPUT);
  pinMode(west_red, OUTPUT);
  pinMode(west_yellow, OUTPUT);
  pinMode(west_green, OUTPUT);

}

// Not the most efficient code, but does highlight the state of every LED for each part of the sequence
void loop() {
  digitalWrite(north_red, HIGH);
  digitalWrite(north_yellow, LOW);
  digitalWrite(north_green, LOW);
  digitalWrite(west_red, LOW);
  digitalWrite(west_yellow, LOW);
  digitalWrite(west_green, HIGH);
  delay(3000);
  
  digitalWrite(north_red, HIGH);
  digitalWrite(north_yellow, LOW);
  digitalWrite(north_green, LOW);
  digitalWrite(west_red, LOW);
  digitalWrite(west_yellow, HIGH);
  digitalWrite(west_green, LOW);
  delay(1000);
  
  digitalWrite(north_red, HIGH);
  digitalWrite(north_yellow, LOW);
  digitalWrite(north_green, LOW);
  digitalWrite(west_red, HIGH);
  digitalWrite(west_yellow, LOW);
  digitalWrite(west_green, LOW);
  delay(1000);

  digitalWrite(north_red, LOW);
  digitalWrite(north_yellow, LOW);
  digitalWrite(north_green, HIGH);
  digitalWrite(west_red, HIGH);
  digitalWrite(west_yellow, LOW);
  digitalWrite(west_green, LOW);
  delay(3000);

  digitalWrite(north_red, LOW);
  digitalWrite(north_yellow, HIGH);
  digitalWrite(north_green, LOW);
  digitalWrite(west_red, HIGH);
  digitalWrite(west_yellow, LOW);
  digitalWrite(west_green, LOW);
  delay(1000);

  digitalWrite(north_red, HIGH);
  digitalWrite(north_yellow, LOW);
  digitalWrite(north_green, LOW);
  digitalWrite(west_red, HIGH);
  digitalWrite(west_yellow, LOW);
  digitalWrite(west_green, LOW);
  delay(1000);


}