#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define STEMP 50
#define MIN_DELAY 50
#define MAX_DELAY 1000

int del = MIN_DELAY;
int led = 13;
uint32_t ledTmr;
int inkButton = 11;
int decButton = 10;
int resetButton = 9;
uint32_t tmr;

void setup() {
  // Init
  lcd.init();
  lcd.backlight();

  pinMode(led, OUTPUT);
  pinMode(inkButton, INPUT);
  pinMode(decButton, INPUT);
  pinMode(resetButton, INPUT);
}


void loop() {
  if (digitalRead(inkButton) == HIGH && del != MAX_DELAY) {
    del += STEMP;
    lcd.setCursor(0, 0);
    lcd.print(del);
  }

  if (millis() - ledTmr >= 1000) {
    ledTmr = millis();
    digitalWrite(led, HIGH);
  }
  digitalWrite(led, LOW);
}