var marker = new THREE.Object3D();
scene.add(marker);
marker.add(sailboat1);
marker.add(camera);

document.addEventListener('keydown', function(event) {
	var code = event.keyCode;
	if (code == 37) sailboat.position.x = sailboat.position.x-40; //left
	if (code == 39) sailboat.position.x = sailboat.position.x+40; //right
	if (code == 38) sailboat.position.z = sailboat.position.z-40; //back
	if (code == 40) sailboat.position.z = sailboat.position.z+40; //forward
	if (code == 67) wind = !wind; // C to Spin
} ) ;