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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

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

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  if (!display.begin(SSD1306`_SWITCHCAPVCC, 0x3C)){
    Serial.println(F("SSD1306 allocation falled"));
    for(;;);
  }
}

void loop() {
  delay(200);
  display.clearDisplay();
  display.drawLine(100,20,30,40,WHITE);
  display.display();
  delay(5000);
  display.clearDisplay();
  display.fillCircle(64, 32, 10, WHITE);
  display.drawRoundRect(10, 10, 30, 50, 2, WHITE);
  display.display();
  delay(5000);
  delay(10);
}