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

// Define OLED display width and height
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

// Declare the OLED object (I2C Address: 0x3C)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(115200);

  // Initialize the OLED display
  if (!display.begin(0x3C, SDA, SCL)) { // 0x3C is the default I2C address for many OLEDs
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Infinite loop on failure
  }

  // Clear the buffer
  display.clearDisplay();

  // Set text size and color
  display.setTextSize(2);        // Text size
  display.setTextColor(SSD1306_WHITE); // Text color
  display.setCursor(0, 0);       // Set initial cursor position
  display.display();             // Show the initial display
}

void loop() {
  for (int i = 0; i < 100; i++) {  // Loop through numbers 00 to 99
    // Clear the display
    display.clearDisplay();

    // Format the number as two digits
    char formattedNumber[3];
    sprintf(formattedNumber, "%02d", i);

    // Display the formatted number
    display.setCursor(40, 20); // Adjust position for better alignment
    display.println(formattedNumber);

    // Update the display with the new content
    display.display();

    delay(500); // Pause for half a second between numbers
  }
}