#include <Adafruit_SSD1306.h>

#define OLED_RESET 0        // GPIO0
#define OLED_I2C_ADDR 0x3C  // set I2C-address of the OLED-Display (see datasheet)

Adafruit_SSD1306 oledDisplay(OLED_RESET); // create oled-display instance

int minuteCounter = 0; // initialize minute-counter
int secondCounter = 0; // initialize second-counter

void setup() {
  // initialize oled-display
  oledDisplay.begin(SSD1306_SWITCHCAPVCC, OLED_I2C_ADDR);

  // set text settings
  oledDisplay.setTextSize(1);
  oledDisplay.setTextColor(WHITE);
}

void loop() {
  oledDisplay.clearDisplay();

  oledDisplay.setCursor(0,13);
  oledDisplay.println("min: " + String(minuteCounter));
  oledDisplay.setCursor(0,25);
  oledDisplay.println("sec: " + String(secondCounter));

  oledDisplay.display();

  secondCounter = secondCounter + 1;
  if (secondCounter == 60) {
    secondCounter = 0;
    minuteCounter = minuteCounter + 1;
  }

  delay(1000); // pause for one second (1.000 milliseconds)
}