int rgb_pins[] = {9, 10, 11}; // red, green, blue
int button_pin = 7;

// attachInterrupt interrupt triggered on a ... input:
//LOW to trigger the interrupt whenever the pin is low
//CHANGE to trigger the interrupt whenever the pin changes value
//RISING to trigger when the pin goes from low to high
//FALLING for when the pin goes from high to low
// https://wokwi.com/projects/388719555383518209

int button_state_saved = 0;
// volatile bool runAllowed = false;
// bool button_state = 0;

void setup() {
  Serial.begin(9600);
  // Serial.println(rgb_pins.len);

  for (int i = 0; i < 3; i++) {
    pinMode(rgb_pins[i], OUTPUT);
  }
  pinMode(button_pin, INPUT);
  attachInterrupt(digitalPinToInterrupt(button_pin), interrupt_handler, RISING);
  // attachInterrupt(digitalPinToInterrupt(button_pin), );
}

void interrupt_handler()
{
  // button_state_saved = -button_state_saved;
  button_state_saved = !button_state_saved;
}

void loop() {
  // button_state = digitalRead(button_pin);
  read_button();
  if (button_state_saved) {
    changing_colors();
  }
  // runAllowed = digitalRead(button_pin);
  // if(runAllowed){
  //   for(int i=0; i<1000; i++){
  //   Serial.print("i = ");
  //   Serial.print(i);
  //   Serial.print("  ");
  //   Serial.println("Motor running");
  //   if(not runAllowed){
  //     Serial.println("Interrupt called");
  //     break;
  //   }}}
  // Serial.println(button_state);

  // if ()
  // changing_colors();
}

void read_button() {
  int current_button_state = digitalRead(button_pin);
  if (button_state_saved != current_button_state) {
    button_state_saved = current_button_state;
  }
}

void changing_colors() {
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 3; j++) {
      // if (i == j) {
      //   digitalWrite(rgb_pins[j], i == j);
      // }
      // else {
      //   digitalWrite(rgb_pins[j], i == j);
      // }
      digitalWrite(rgb_pins[j], i == j);
      // digitalWrite(rgb_pins[0], LOW);
      // digitalWrite(rgb_pins[1], HIGH);
      // digitalWrite(rgb_pins[2], LOW);
      // Serial.println(i == j);
    }
    delay(500);
  }
  for (int i = 0; i < 3; i++) {
    digitalWrite(rgb_pins[i], LOW);
  }
}

// void funcStartStop() {
//   noInterrupts();
//   button_state = !button_state;
//   interrupts();
// }

// void switchPressed ()
// {
//   if (digitalRead(button_pin) == HIGH)
//     digitalWrite (13, HIGH);
//   else
//     digitalWrite(13, LOW);
// }  // end of switchPressed

// void turnonled()
// {
//   // button_state_saved = -button_state_saved;
//   runAllowed = !runAllowed;
// }