// coded by Markus Scheurer, last edited 2023-11-21

// definitions for lights and button

#define car_red 10
#define car_orange 9
#define car_green 8
#define pedestrian_red 7
#define pedestrian_green 6
#define pushbutton 13

// bool status
bool condition = 0 ; // 0 = low, 1 = high; https://docs.wokwi.com/parts/wokwi-pushbutton

// definitions for lopps
#define short_loop 2000
#define long_loop 5000

// configuration for traffic lights and push button

void setup() {
  // car traffic lights
  pinMode(car_red, OUTPUT);
  pinMode(car_orange, OUTPUT);
  pinMode(car_green, OUTPUT);

  // pedestrian traffic lights
  pinMode(pedestrian_red, OUTPUT);
  pinMode(pedestrian_green, OUTPUT);

  // condition push button
  pinMode(pushbutton, INPUT_PULLUP); //INPUT_PULLUP = activate electric resistance

    // Turn on the traffic light in check mode 
  digitalWrite(car_red, HIGH);
  digitalWrite(pedestrian_red, HIGH);
  delay(short_loop);
  digitalWrite(car_orange, HIGH);
  delay(short_loop);

}

void loop() {

  // initial situation
  digitalWrite(car_red, LOW);
  digitalWrite(car_orange, LOW);
  digitalWrite(car_green, HIGH);
  digitalWrite(pedestrian_green, LOW);
  delay(short_loop);
    
  condition =! digitalRead(pushbutton);

// pullup resistance activated, low = button is pushed
// do this when button is pushed
  if (condition == HIGH){
    delay(200);
    
    // after 2 seconds change car traffic light from green to orange
    digitalWrite(car_green, LOW);
    digitalWrite(car_orange, HIGH);
    delay(short_loop);

    // after 2 seconds change car traffic light from orange to red
    digitalWrite(car_orange, LOW);
    digitalWrite(car_red, HIGH);
    delay(short_loop);

    // after 2 second change pedestrian traffic light from red to green, pedestrians have 5 seconds to walk
    digitalWrite(pedestrian_red, LOW);
    digitalWrite(pedestrian_green, HIGH);
    delay(long_loop);

    // after 5 seconds change car traffic light, activate orange plus red
    digitalWrite(car_orange, HIGH);
    delay(short_loop);

    // after 2 seconds change pedestrian traffic light back to red, but wait 2 seconds to set green for cars again
    digitalWrite(pedestrian_red, HIGH);
    digitalWrite(pedestrian_green, LOW);
    
    // after 2 second change car traffic light back to green
    delay(short_loop);

 }
}