#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

// declare an SSD1306 display object connected to I2C
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  Serial.begin(9600);
  // initialize OLED display with address 0x3C for 128x64
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }

  delay(1000); // wait for initializing
  oled.clearDisplay();
  oled.setCursor(0, 0);
}

void drawBullet(){
  int drawX = 80, drawY = 40;
  for (int i = 0; i<3; i++){
    oled.fillTriangle(drawX + 2, drawY-2, drawX, drawY, drawX + 4, drawY, WHITE);
    oled.fillRect(drawX, drawY + 1, 5, 8, WHITE);
    
    drawX = drawX + 8;
  }
  oled.display();
}

void loop() {
  drawBullet();
  // delay(2000);
}