% A 2-by-2 room with lower left corner at (-.2,-.2).
% Top wall is "guarded" by virtual wall

% left wall
wall -.3 1.7 -.3 -.3
% bottom wall
wall -.3 -.3 1.7 -.3
% right wall
wall 1.7 -.3 1.7 1.7
% Virtual wall
virtwall 2.5 1.7 2.9 2

% floor markings
line 1 .5 1.2 1.2
line .5 .5 1 .5
line .5 1.2 .5 .5
line .2 1 .4 .2

