train_moving

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

// 0x1306.dev · animation: train_moving · 8 frames · 67ms
#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 67

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

  int cx = 64;
  int cy = 38;
  
  // Motion offset mapping
  int offset = -((int)(frame * 3.2)) % 32;

  // --- track ---
  display.drawFastHLine(0, cy + 6, 128, WHITE);

  for (int i = 0; i < 3; i++) {
    int carX = cx + (i * 25) + offset;
    
    // box
    display.fillRect(carX, cy - 15, 22, 18, WHITE);
    display.fillRect(carX + 5, cy - 10, 6, 6, BLACK);
    display.fillRect(carX + 15, cy - 10, 6, 6, BLACK);
    
    // connectors
    if (i < 2) {
      display.fillRect(carX + 22, cy - 2, 3, 2, WHITE);
    }

    // wheels
    display.fillCircle(carX + 5, cy + 3, 2, WHITE);
    display.fillCircle(carX + 17, cy + 3, 2, 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);
  }
}