public void initialize()
{
if (!isInitialized) {
for (int i=0; i<8; ++i) {
GameObject newSection = Instantiate (tunnelPrefab, new Vector3 (0, 0, i * 4f), Quaternion.identity) as GameObject;
newSection.transform.parent = tunnelContainer.transform;
}
isInitialized = true;
}
}