#include <LiquidCrystal.h>


LiquidCrystal lcd(1, 0, A2, A3, A4, A5);

int pinsGesamt = 11;                             // definiert  wie viele Pins verwendet werden
int pins[] = {13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3}; // definiert ein Array mit den verwendetn Pins

int timer = 0;
int timerset = 1;

int button = 2;
int buttonstate = 0;
int potpin = A0;
int beeppin = A1;


void setup() {

  lcd.begin(16, 2);

  pinMode(button, INPUT);

  for (int i = 0; i < pinsGesamt; i = i + 1) {

    pinMode(pins[i], OUTPUT);
  }
}


void loop() {

  int timerset = map(analogRead(potpin), 0, 1023, 1, 5);
  int timer = timerset * 60; // Sekundenzähler

  lcd.setCursor(0, 0);
  lcd.print(" ");
  lcd.setCursor(0, 0);
  lcd.print(timerset);

  lcd.setCursor(2, 0);
  lcd.print("Min.");

  if (digitalRead(button) == HIGH) {
    buttonstate = !buttonstate;
    delay(30);
  }
  if (buttonstate == HIGH) {

    count(timerset, timer);
  }
  else {
    waiting();
  }

}



void on(int pin) {
  digitalWrite(pins[pin - 1], HIGH);
}

void off(int pin) {
  digitalWrite(pins[pin - 1], LOW);
}

void count(int set, int counter) {

  if (counter > set * 60 * 0.75) {

    on(1);
  }
  else {
    off(1);

    on(11);
  }
  if (counter > set * 60 * 0.5) {
    on(2);
  }
  else {
    off(2);

    on(10);
  }
  if (counter > set * 60 * 0.25) {

    on(3);
  }
  else {
    off(3);

    on(9);

  }
  if (counter > 1) {

    on(4);
  }
  else {
    off(4);
    on(8);
    finish();
  }



  lcd.setCursor(8, 0);
  lcd.print("   ");
  lcd.setCursor(8, 0);
  lcd.print(counter);

  // lcd.print(" sec.");

  lcd.setCursor(0, 1);
  lcd.print("counting...");

// Sand ----------------------
  on(5);
  delay(333);
  off(5);

  on(6);
  delay(334);
  off(6);

  on(7);
  delay(333);
  off(7);

// Sand ----------------------

  counter--;

}


void waiting() {

  lcd.setCursor(0, 1);
  lcd.print("waiting...");


}

void finish() {
  buttonstate = !buttonstate;
  timer = 0;

  for (int i = 0 ; i < pinsGesamt + 1; i++) {
    off(i);
    digitalWrite(beeppin, HIGH);
    delay(200);
    digitalWrite(beeppin, LOW);
    delay(200);
    digitalWrite(beeppin, HIGH);
    delay(200);
    digitalWrite(beeppin, LOW);
    delay(200);
    digitalWrite(beeppin, HIGH);
    delay(200);
    digitalWrite(beeppin, LOW);


  }

}