Animating with particles

In this section, we will show you how to create great particle effects and animate them. First, we will create a new file for storing our effects in the utils folder, which we can use from anywhere:

1. In the utils folder, create a new file called effects.dart and open the file.
2. Add the following code for creating the exploding particle:

   Particle explodingParticle(Vector2 origin, 
     MaterialColor color) {
     double distanceToMove = 15.0;
     return Particle.generate(
       lifespan: 0.8,
       count: 12,
       generator: (i) {
         double angle = i * 30;
         double xx = 
           origin.x  + (distanceToMove * cos(angle));
         double yy = 
           origin.x  + (distanceToMove * sin...