void OnSceneGUI()
{
int i;
for(i = 0; i < _target.Nodes.Length -1; i++)
{
Handles.DrawLine(_target.Nodes[i].transform.position, _target.Nodes[i+1].transform.position);
}
Handles.DrawLine(_target.Nodes[i].transform.position, _target.Nodes[0].transform.position);
if (GUI.changed)
EditorUtility.SetDirty (target);
}