z-508-x futuristic robot in grass 3D model

The far far future... Earths surface became barely livable: huge, frequent tornadoes, floods, intense heats and colds. Human race (whats left of it) descended underground. In order to keep peace and order, the z-508-x was created. Z-508-X is a primary safety unit created by one of the first people that came underground. It is a reminiscence of other creatures that did not make it safely underground. Although now it is an outdated model it still floats the corridors keeping peace (or just floats)...