#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <RTClib.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 32

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

RTC_DS1307 rtc;

void setup() {
  // Initialize the I2C bus
  Wire.begin();
  
  rtc.begin();

  //rtc.adjust(DateTime(YYYY, MM, DD, hh, mm, ss));
rtc.adjust(DateTime(0,0,0,15,50,10));
  
  // Initialize the OLED display
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  
  // Clear the display buffer
  display.clearDisplay();
}

void loop() {
  // Clear the display buffer
  display.clearDisplay();
  
  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(2);
  display.setCursor(0,0);
  
  DateTime now = rtc.now();
  
  display.print(now.hour(), DEC);
  display.print(':');
  display.print(now.minute(), DEC);
  display.print(':');
  display.print(now.second(), DEC);

  display.display();
}