flag_wave

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

// 0x1306.dev · animation: flag_wave · 6 frames · 100ms
#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 6
#define FRAME_DELAY 100

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

  int wave[] = {0, 1, 2, 3, 2, 1};
  int w = wave[frame % 6];
  int pole_x = 20;
  display.drawFastVLine(pole_x, 4, 56, WHITE);
  int flag_x = 21;
  int flag_w = 60 + w;
  int flag_y_top = 8;
  display.fillRect(flag_x, flag_y_top, flag_w, 10, WHITE);
  display.fillRect(flag_x, flag_y_top + 10, flag_w, 10, BLACK);
  display.drawFastHLine(flag_x, flag_y_top + 10, flag_w, WHITE);
  display.drawFastHLine(flag_x, flag_y_top + 19, flag_w, WHITE);
  display.fillRect(flag_x, flag_y_top + 20, flag_w, 10, WHITE);
  display.drawCircle(flag_x + flag_w / 2, flag_y_top + 15, 4, WHITE);

  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);
  }
}