#include <Wire.h>
#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

#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(9600);

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display.display();
  delay(2000); // Pause for 2 seconds

  // Clear the buffer
  display.clearDisplay();

  drawEmoji();
  
}

void loop() {
}

void testdrawcircle(void) {
  display.clearDisplay();

  display.drawCircle(display.width()/2, display.height()/2, 10, SSD1306_WHITE);
  display.display();
  delay(1);
  
}


void drawEmoji(void) {
  display.clearDisplay();

  display.drawCircle(display.width()/2, display.height()/2, 30, WHITE);
  
  display.fillCircle(display.width()/2, display.height()/2+5, 15, SSD1306_WHITE);
  
  display.fillCircle(display.width()/2, display.height()/2+2, 15, SSD1306_BLACK);
  
  display.fillCircle(display.width()/2-10, display.height()/2-10, 5, SSD1306_WHITE);
 
  display.fillCircle(display.width()/2+10, display.height()/2-10, 5, WHITE);
  
  display.display();
 
}