physical
  block
    key 0 1
    key 1 0.5
    key 2 0
    key 3 0.5
    key 4 1
  end

  block
    place 0 0
    place 7 0
  end

  place 0 2

  block
    key 0 0
    key 1 0
  end

  place 3.5 4.5 0.2617993878 4 5
  place 6.5 4.5 -0.2617993878 8 5