));
                sphere.velocity = new THREE.Vector3(randVel(), randVel(), randVel());
                sphere.spin = new THREE.Euler(0,0,0);
                sphere.mass = OBJ_MASS;
                sphere.name = "Sphere" + n;
                objects.add(sphere);

                var helper = new THREE.BoxHelper(sphere, 0xff0000);
                sphere.limit = WALL_LIMIT - helper.geometry.boundingSphere.radius;
            }

            function createCylinder( n ) {

                var geo