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

#define SCREEN_WIDTH 128    // OLED display width, in pixels
#define SCREEN_HEIGHT 64    // OLED display height, in pixels
#define OLED_RESET     -1   // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C // < See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  Serial.begin(115200);

  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;); // Don't proceed, loop forever
  }

  display.clearDisplay();
  display.setTextSize(1);           
  display.setTextColor(SSD1306_WHITE);      
  display.setCursor(0,0); 
  display.println("Hello World");
  display.display();
}

void loop() {
  // set cursor to first column, first row
  display.setCursor(0, 0);
  // print message
  display.print("One");
  delay(1000);
  // clears the display to print new message
  display.clearDisplay();
  // set cursor to first column, second row
  display.setCursor(0,1);
  display.print("Two");
  delay(1000);
  display.clearDisplay(); 
}