// https://wokwi.com/projects/396896548104172545
// https://forum.arduino.cc/t/run-the-function-once-button-is-press/1255473

const int BUTTON_PIN = 7;  // Connect the Button to pin 7 or change here
const int LED_PIN    = 13; 

// variables will change:
int ledState = LOW;        // tracks the current state of LED
int lastButtonState;        // the previous state of button
int currentButtonState; // the current state of button

int time = 0;
int counter = 0;
int current_time=0;

// relay variable
int Relay[4] = {A0, A1, A2, A3};  
  
void Show();
void Show_off();

void setup() {
  Serial.begin(9600);

  pinMode(BUTTON_PIN, INPUT_PULLUP);
  currentButtonState = digitalRead(BUTTON_PIN);

  for (int i = 0; i < 4; i++)
    pinMode(Relay[i], OUTPUT);

  
  pinMode(LED_PIN,OUTPUT);
}
  
void loop() {
  lastButtonState = currentButtonState;           // save the last state
  currentButtonState = digitalRead(BUTTON_PIN);   // read new state

// if you need to here:  Serial.println(currentButtonState);

  if (lastButtonState == HIGH && currentButtonState == LOW) {
    Serial.print("The button is pressed: ");
//    Show();

  
    // toggle state of LED
    if(ledState == LOW) {
       ledState = HIGH;
//        Show(); 
       Serial.println("Turning LED on"); 
    }
    else {
      ledState = LOW; 
//      Show_off();
      Serial.println("Turning LED off"); 
    }

  }

    // control LED arccoding to the toggled state
    digitalWrite(LED_PIN, ledState);  //turns the LED on or off based on the variable

// run one of the two machines
  if (ledState) Show();
  else Show_Off();

  delay(20);    // poor man's debouncing
}

void Show() {
  current_time=millis();
  if((current_time-time) >= 100) {    // was 1000. life too short

  time=current_time;

  counter++;
  
// if you must here:  Serial.println(counter);

    switch (counter) {
    case 5 :
          digitalWrite(Relay[0], HIGH);
      break;

    case 10 :
        digitalWrite(Relay[1], HIGH);
      break;

    case 15 :
        digitalWrite(Relay[2], HIGH);
      break;

    case 20 :
          digitalWrite(Relay[03], HIGH);
      break;

    default:
      // turn all the LEDs off:
      for (int i = 0; i < 4; i++)
        digitalWrite(Relay[i], LOW);

        if(counter >= 25)
          counter = 0;

      break;
    }
  }
}

void Show_Off(){
  for (int i = 0; i < 4; i++)
    digitalWrite(Relay[i], LOW);

  counter = 0;
}