Add room to threejs

gistfile1.txt

//ROOM
    var roomGeometry = new THREE.BoxGeometry( 20, 10, 20 );
    var roomFrontMaterial = new THREE.MeshPhongMaterial( {
        color: 0xffffff,
        transparent: true,
        opacity: 0.1
    } );
    var roomFront = new THREE.Mesh( roomGeometry, roomFrontMaterial );
    roomFront.position.y = 5;
    var roomBackMaterial = new THREE.MeshPhongMaterial( {
        color: 0xffffff,
        transparent: false,
        side: THREE.BackSide
    } );
    var roomBack = new THREE.Mesh( roomGeometry, roomBackMaterial );
    roomBack.position.y = 5;
    scene.add( roomFront, roomBack );