class Draggable {
 
 float x,y;
 int wid = 6;
 boolean dragging = false;
 
 Draggable(float ax, float ay){
   x=ax;
   y=ay;
 }
 
 void update(){
   if(dragging){
    x=mouseX;
    y=mouseY;
   }
  rect(x-wid/2,y-wid/2,wid,wid);
 }
  
}