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/*
 * Attempting a Stoplight Program
 */

const int buttonPin = 12;
const int greenLED = 2;
const int yellowLED = 3;
const int redLED= 4;

bool buttonPressed = false;


// the setup function runs once when you press reset or power the board

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(yellowLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(buttonPin, INPUT);
  //Space
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
    Serial.println(digitalRead(buttonPin));
    buttonPressed = digitalRead(buttonPin);
    if(digitalRead(buttonPin)){
      buttonPressed = true;
      lightChange();
    }else{if(!buttonPressed){
      lightGo();
    }
    }

  //Step();
}
void lightStop(){
    digitalWrite(greenLED, LOW);
    digitalWrite(yellowLED,LOW);
    digitalWrite(redLED,HIGH);
}

void lightGo(){
      digitalWrite(greenLED, HIGH);
      digitalWrite(yellowLED,LOW);
      digitalWrite(redLED,LOW);
}
void lightYield(){
      digitalWrite(greenLED, LOW);
      digitalWrite(yellowLED,HIGH);
      digitalWrite(redLED,LOW);
}
void lightChange(){
      buttonPressed = false;
      lightGo();
      delay(2000);
      lightYield();
      delay(2000);
      lightStop();
      delay(2000);

}


/*void Step() {
  int newi1 = i2;
  out = i1 + i2;
  i1= i2;
  i2 = out;
  Serial.println(out);
  if( out >= 100) {
    i1 = 0;
    i2 = 1;
    out = 1;
  }
}
*/