// Name: Karl Edward Sarmiento
// Purpose: Traffic Light System
// Commentary: In this lab, I learned how to code a traffic light system that can light-up the LEDs by activating the output-pins using codes. Also, I wrote codes that can control the timer of the LEDs by delaying them to when it will light up. 

int button_value = 7;
int button_pin = 7;

void setup() {
  Serial.begin(9600);
  pinMode(button_pin, INPUT_PULLUP);
  // LED test
  pinMode(22, OUTPUT);         // Red
  pinMode(26, OUTPUT);         // Yellow
  pinMode(32, OUTPUT);         // Green
  pinMode(23, OUTPUT);        // Ground-Red
  pinMode(27, OUTPUT);        // Ground-Yellow
  pinMode(33, OUTPUT);        // Ground-Green
  // Grounds for the LEDs
  digitalWrite(22, LOW);
  digitalWrite(26, LOW);
  digitalWrite(32, LOW);
  
  digitalWrite(33, HIGH);      //  Keep the green light on once the simulation starts

}

void loop() {
  button_value = digitalRead(button_pin);
  if (button_value == 0)
    {
    digitalWrite(33, LOW);    // Button pressed: Green off
    digitalWrite(27, HIGH);   // Yellow LED turn on
    delay(2000);                                    // LED stay on for 2s
    digitalWrite(27, LOW);    // Yellow LED turn off
    digitalWrite(23, HIGH);   // Red LED turn on
    delay(5000);                                    // LED stay on for 5s
    digitalWrite(23, LOW);    // Red LED turn off
    digitalWrite(33, HIGH);   // Green turn back on

    //Serial.println("Karl Edward Sarmiento");
    //digitalWrite(22, HIGH);
    //digitalWrite(26, HIGH);
    //digitalWrite(32, HIGH);
    }
//digitalWrite(22, LOW);
//digitalWrite(26, LOW);
//digitalWrite(32, LOW);
}