fun_effect.dart

import 'package:flutter/material.dart';
import 'package:flame/components.dart';
import 'package:flame/game.dart';
import 'package:flame/effects.dart';

void main() {
  const shadowSize = 10.0;
  runApp(
    GameWidget(
      game: FlameGame(
        children: [
          PositionComponent(
            position: Vector2(200, 200),
            children: [
              RectangleComponent(
                size: Vector2(50 + shadowSize, 50),
                position: Vector2(-shadowSize, 0),
                paint: Paint()..color = Colors.blue,
                anchor: Anchor.center,
                children: [
                  SequenceEffect(
                    [
                      ColorEffect(
                        const Color(0xFF000000),
                        const Offset(0.0, 0.8),
                        EffectController(duration: 1),
                      ),
                      ColorEffect(
                        const Color(0xFF000000),
                        const Offset(0.8, 0),
                        EffectController(duration: 1),
                      ),
                    ],
                    infinite: true,
                  ),
                  SequenceEffect(
                    [
                      ScaleEffect.to(
                        Vector2(.2, 1),
                        EffectController(duration: .5),
                      ),
                      ScaleEffect.to(
                        Vector2(-1, 1),
                        EffectController(duration: .5),
                      ),
                      ScaleEffect.to(
                        Vector2(.2, 1),
                        EffectController(duration: .5),
                      ),
                      ScaleEffect.to(
                        Vector2(1, 1),
                        EffectController(duration: .5),
                      ),
                    ],
                    infinite: true,
                  ),
                  SequenceEffect(
                    [
                      MoveEffect.to(
                        Vector2(shadowSize, 0),
                        EffectController(duration: 1),
                      ),
                      MoveEffect.to(
                        Vector2(-shadowSize, 0),
                        EffectController(duration: 1),
                      ),
                    ],
                    infinite: true,
                  ),
                ],
              ),
              RectangleComponent(
                size: Vector2.all(50),
                paint: Paint()..color = Colors.blue,
                anchor: Anchor.center,
                children: [
                  SequenceEffect(
                    [
                      ScaleEffect.to(
                        Vector2(.2, 1),
                        EffectController(duration: .5),
                      ),
                      ScaleEffect.to(
                        Vector2(-1, 1),
                        EffectController(duration: .5),
                      ),
                      ScaleEffect.to(
                        Vector2(.2, 1),
                        EffectController(duration: .5),
                      ),
                      ScaleEffect.to(
                        Vector2(1, 1),
                        EffectController(duration: .5),
                      ),
                    ],
                    infinite: true,
                  ),
                  SequenceEffect(
                    [
                      ColorEffect(
                        const Color(0xFF000000),
                        const Offset(0.8, 0),
                        EffectController(duration: 1),
                      ),
                      ColorEffect(
                        const Color(0xFF000000),
                        const Offset(0.0, 0.8),
                        EffectController(duration: 1),
                      ),
                    ],
                    infinite: true,
                  ),
                ],
              ),
            ],
          ),
        ],
      ),
    ),
  );
}