			ground.receiveShadow = true;
				textureLoader.load( 'textures/grid.png', function ( texture ) {

					texture.colorSpace = THREE.SRGBColorSpace;
					texture.wrapS = THREE.RepeatWrapping;
					texture.wrapT = THREE.RepeatWrapping;
					texture.repeat.set( 40, 40 );
					ground.material.map = texture;
					ground.material.needsUpdate = true;

	} );

				// Wall
				const brickMass = 0.5;
				const brickLength = 1.2;
				const brickDepth = 0.6;
				const brickHeight = brickLength * 0.5;
				const numBrick