PImage b;

void setup(){
   size(640,480);
   strokeWeight(1);
   noFill();
   smooth();
   b = loadImage("buddha.jpg");
}


class Flashlight {
   int x,y,maxWidth;
   int diam = 0;
   int alphaVal = 0;

   Flashlight(int _x, int _y, int _maxWidth) {
     x = _x;
     y = _y;
     maxWidth = _maxWidth;
   }

   void spotter() {
     for(int i=0;i<this.maxWidth;i++) {
       stroke(0,0,0,alphaVal);
       ellipse(this.x, this.y,diam*2,diam*2);
       diam++;
       if(alphaVal<=255) alphaVal++;
     }
   }
}


void draw(){
   image(b,0,0);
   //spotter();
   Flashlight flash1 = new Flashlight(mouseX, mouseY, width*3);
   flash1.spotter();
}