LCD + RTC => Menu aquarium

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Voilà l'autre partie j'espère que c'est compréhensible

int evaluateButton(int x) {
  int result = 0;
  if (x < 50) {
    result = 1; // right
  } else if (x < 195) {
    result = 2; // up
  } else if (x < 380) {
    result = 3; // down
  } else if (x < 790) {
    result = 4; // left
  }
  return result;
}


void drawInstructions() {
  lcd.setCursor(0, 1); // Set cursor to the bottom line
  lcd.print("Use ");
  lcd.write(byte(1)); // Up arrow
  lcd.print("/");
  lcd.write(byte(2)); // Down arrow
  lcd.print(" buttons");
}

void menuItem1() { // Function executes when you select the 2nd item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 2");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem2() { // Function executes when you select the 2nd item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 2");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem3() { // Function executes when you select the 3rd item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 3");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem4() { // Function executes when you select the 4th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 4");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem5() { // Function executes when you select the 5th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 5");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem6() { // Function executes when you select the 6th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 6");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem7() { // Function executes when you select the 7th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 7");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem8() { // Function executes when you select the 8th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 8");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem9() { // Function executes when you select the 9th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 9");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}

void menuItem10() { // Function executes when you select the 10th item from main menu
  int activeButton = 0;

  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Sub Menu 10");

  while (activeButton == 0) {
    int button;
    readKey = analogRead(0);
    if (readKey < 790) {
      delay(100);
      readKey = analogRead(0);
    }
    button = evaluateButton(readKey);
    switch (button) {
      case 4:  // This case will execute if the "back" button is pressed
        button = 0;
        activeButton = 1;
        break;
    }
  }
}