Validator Machine

facing=east,part=bottom,state=off facing=east,part=bottom,state=on facing=east,part=top,state=fail facing=east,part=top,state=off facing=east,part=top,state=on facing=east,part=top,state=success facing=north,part=bottom,state=off facing=north,part=bottom,state=on facing=north,part=top,state=fail facing=north,part=top,state=off facing=north,part=top,state=on facing=north,part=top,state=success facing=south,part=bottom,state=off facing=south,part=bottom,state=on facing=south,part=top,state=fail facing=south,part=top,state=off facing=south,part=top,state=on facing=south,part=top,state=success facing=west,part=bottom,state=off facing=west,part=bottom,state=on facing=west,part=top,state=fail facing=west,part=top,state=off facing=west,part=top,state=on facing=west,part=top,state=success