nst upMesh = new Mesh(upBox, material);
                upMesh.position.set(0, 150, 125);
                this.add(upMesh);

                const topBox = new BoxGeometry(150, 50, 50);
                const topMesh = new Mesh(topBox, material);
                topMesh.position.set(100, 250, 125);
                this.add(topMesh);

                const topPlane = new PlaneGeometry(50, 50);
                const topPlaneMesh = new Mesh(topPlane, material);
                topPlaneMesh.position.set(200, 275