 XYWAL                                                              Menu: WALLS
 ==============================================================================
 Creates two consecutive orthogonal walls at right angles.

         1.   (POINT) first wall point
         2. * (POINT) next wall point

 Description:
 This command connects two points on the xy plane by two consecutive walls, the
 first wall parallel to the x axis and the second parallel to the y axis. The
 first wall spans from the first point to an interim point with the y value of
 the first point and the x value of the second point. The second wall starts at
 the interim point and spans to the second point.
 Pick two points. The walls are created. You are prompted to pick additional
 points, each adding two more orthogonal segments to the wall sequence, until
 you select a new command.

         Example: \xywal 0 0 0 4 4 0

 Result: Two walls are created: one with its axis from 00 0 to 4 0 0; and the
 second from 4 0 0 to 4 4 0.
