mesh
  vertex 225 -223 54
  vertex 225 -215 54
  vertex 233 -215 54
  vertex 233 -223 54
  vertex 225 -223 55
  vertex 225 -215 55
  vertex 233 -215 55
  vertex 233 -223 55
  face
   vertices 3 2 1 0
   matref caution_green
  endface
  face
   vertices 4 5 6 7
   passable
   matref caution_red
   phydrv moveup
  endface
 end