abstract class Widget {
  // Attributes
  float x, y;  // location
  float s;     // Size
  
  // Constructor(s)
  Widget(float x, float y, float s) {
    this.x = x;
    this.y = y;
    this.s = s;
  } // Widget()
  
  // Methods
  void jiggle() {
    x = x + random(-1, 1);
    y = y + random(-1, 1);
  } // jiggle()
  
  abstract void display();	// All subclasses will have to define this
  
  // Print method
  String toString() {
    return "Widget of size: " + s + " at <" + x + "," + y;
  } // toString()
  
} // class Widget