/*
  Traffic Lights Arduino Shield
  Darcy Whyte, darcy@inventorArtist.com
 */

// Make a name for each Arduino pin
int red = 2;
int amber = 4;
int green = 6;
int walk = 8;
int dontWalk = 10;

// How fast do the lights change?
int delayMS = 3000;

// the setup routine runs once when you press reset:
void setup() {                
  // initialize digital pins as output.
  pinMode(red, OUTPUT);     
  pinMode(amber, OUTPUT);  
  pinMode(green, OUTPUT);  
  pinMode(walk, OUTPUT);  
  pinMode(dontWalk, OUTPUT);  
}

// the loop routine runs over and over again forever:
void loop() {

  //Red
  clearAll();
  digitalWrite(red, HIGH); 
  digitalWrite(dontWalk, HIGH); 
  delay(delayMS); 

  //Green
  clearAll();
  digitalWrite(green, HIGH);
  digitalWrite(walk, HIGH); 
  delay(delayMS);  

  //Don't Walk Flash
  for (int i = 0; i <= 5; i++) {
    clearAll();
    digitalWrite(green, HIGH);
    //digitalWrite(walk, HIGH); 
    delay(delayMS/5); 
    clearAll();
    digitalWrite(green, HIGH);
    digitalWrite(dontWalk, HIGH); 
    delay(delayMS/5);  
  }

  //Amber
  clearAll();
  digitalWrite(amber, HIGH);
  digitalWrite(dontWalk, HIGH); 
  delay(delayMS);    

}

//Turn all lights off
void clearAll() {
  digitalWrite(red, LOW); 
  digitalWrite(amber, LOW); 
  digitalWrite(green, LOW); 
  digitalWrite(walk, LOW); 
  digitalWrite(dontWalk, LOW);   
}