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

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

int count = 0;

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

void setup() {
  oled.setTextSize(2);
  // TEST lines ***
  oled.setTextColor(WHITE); // characters "overwrite"
  //oled.setTextColor(WHITE, BLACK);  // prevents "overwriting"
  // **************
  oled.setRotation(0);  // "2" flips display 180°
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3c)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Don't proceed, loop forever
  }
  // shows Adafruit logo
  oled.display();
  delay(500);
  oled.clearDisplay();
  // shows splash screen
  oled.setCursor(5, 10);
  oled.print("Text Color");
  oled.setCursor(40, 40);
  oled.print("Test");
  oled.display();
  delay(2000);
  oled.clearDisplay();
  oled.display();
}

void loop() {
  // show a count on screen
  oled.setCursor(55, 20);
  oled.print(count);
  oled.display();
  delay(1000);
  count++;
}