class explosion{
 
 float x,y,power;
   explosion(float px, float py){
      x = px; y = py; 
      power = 255;
   }
  
void  draw(){
    fill(255,230,200,power);
    noStroke();
     ellipse(x,y,20,20); 
     power -= 20;
  }
  boolean done(){
     if(power < 0){
        return true;
     } 
     return false;
  } 
  
}