Dropzone Commander Building Corner

### Update
please see my wrap-around sidewalk for buildings here: https://www.thingiverse.com/thing:2042493
or the sidewalk + destroyed building rubble here: https://www.thingiverse.com/thing:2156026

### If you have a small build platform (like I did when I first made this) then read on...

Building corner in the form of a sidewalk for the buildings in Dropzone Commander.

Update: a gap on one side to allow for the corners where the buildings are joined together and the paper is double