function makeDockAt(x, z) {
var pole = new THREE.Mesh(
new THREE.CylinderGeometry(50, 50, 200),
new THREE.MeshBasicMaterial({ color:0x000000 })
);
pole.position.set(x, -75, z);
scene.add(pole);
}
makeDockAt(350, 500);
makeDockAt(-350, 500);
makeDockAt(400, 0);
makeDockAt(-400, 0);
makeDockAt(450, -500);
makeDockAt(-450, -500);
makeDockAt(500, -1000);
makeDockAt(-500, -1000);