const int BTN_PIN = 12;
const int NUM_TYPES = 5;
const int PAPER_TYPES[NUM_TYPES][2] = {
  {1000, 5},
  {2000, 4},
  {3000, 3},
  {4000, 2},
  {5000, 1}
};

int type = 0;

void checkButton()  {
  static int oldBtnState = HIGH;

  int btnState = digitalRead(BTN_PIN);
  if (btnState != oldBtnState)  {
    oldBtnState = btnState;
    if (btnState == LOW)  { // button was pressed
      Serial.print("Paper type: ");
      Serial.println(type);
      Serial.print("Feed time: ");
      Serial.println(PAPER_TYPES[type][0]);
      Serial.print("Servo count: ");
      Serial.println(PAPER_TYPES[type][1]);
      Serial.println();
      type++;
      if (type >= NUM_TYPES) type = 0;
    } else {                // button was released
      // nothing to do
    }
    delay(20);  // for debounce
  }

}

void setup() {
  Serial.begin(115200);
  pinMode(BTN_PIN, INPUT_PULLUP);
}

void loop() {
  checkButton();
}