text: class Base {
      constructor(x, y, width, height) {
          var options = {
            isStatic: true
          };
          this.width = width;
          this.height = height;
          this.body = Bodies.rectangle(x, y, this.width, this.height, options);
          World.add(world, this.body);
        }
        display() {
          var pos = this.body.position;
          push();
          fill("brown");
          rectMode(CENTER);
          rect(pos.x, pos.y, this.width, this.height);
          pop();
        }
      }
  