class Sprite {
  float x,y;
  float diameter;
  float speed;

  Sprite(float xpos, float ypos, float dia, float sp) {
    x = xpos;
    y = ypos;
    diameter = dia;
    speed = sp;
  }

  void start(float xpos, float ypos, float dia, float sp) {
    x = xpos;
    y = ypos;
    diameter = dia;
    speed = sp;
  }

  void move (float posX, float posY, float damping) {
    float dif = y - posY;
    if (abs(dif) > 1) {
      y -= dif/damping;
    }
    dif = x - posX;
    if (abs(dif) > 1) {
      x -= dif/damping;
    }
  }

  void display() {
    float flap = 500-abs(millis()%1000 - 500);
    flap = map(flap,0,1000,diameter/2,diameter);
    float px = x+100*noise(x/100);
    float py = y+100*noise(y/100);
    ellipse(px,py,flap,flap);
  }
}