diwali_burst

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

// 0x1306.dev · animation: diwali_burst · 8 frames · 83ms
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C

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

#define FRAME_COUNT 8
#define FRAME_DELAY 83

void drawFrame(int frame) {
  display.clearDisplay();

  int cx = 64;
  int cy = 32;

  if (frame > 0) {
    int length = frame * 4 + 4;
    for (int i = 0; i < 12; i++) {
      float ang = (i * 30) * PI / 180.0;
      float x0 = cx + (length * 0.5) * cos(ang);
      float y0 = cy + (length * 0.5) * sin(ang);
      float x1 = cx + length * cos(ang);
      float y1 = cy + length * sin(ang);
      
      display.drawLine(x0, y0, x1, y1, WHITE);
      display.drawPixel(x1 + 2 * cos(ang), y1 + 2 * sin(ang), WHITE); // sparkle
    }
  }

  display.display();
}

void setup() {
  Wire.begin(21, 22); // SDA=21, SCL=22 for ESP32 DevKit // change to 0x3D if display not found
  display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
  display.clearDisplay();
  display.display();
}

void loop() {
  for (int i = 0; i < FRAME_COUNT; i++) {
    drawFrame(i);
    delay(FRAME_DELAY);
  }
}