/*
  Our shape class defines a basic object with a location (x, y) and
  a size (s). Each shape also has a shake() method, whichs adds a
  random component of movement.
*/
class Shape {

    float x;
    float y;
    float s;
    
    Shape(float x_, float y_, float s_) {
        x = x_;
        y = y_;
        s = s_;
    }
    
    void shake() {
        x += random(-1, 1);
        y += random(-1, 1);
    }

}