MyElement e = new MyElement(); //define an element
void setup(){
  e.xspeed = random(1);
  e.yspeed = random(1);
}
void draw(){
  background(200);
  e.move(); //draws the element
}
void mouseDragged(){
  if(dist(mouseX,mouseY,e.xpos,e.ypos)<20){
    e.friction = .5;
    e.xspeed = mouseX-pmouseX;
    e.yspeed = mouseY-pmouseY;
  }
}