extrude select aa
extrude point (0,4) mergetol 0
extrude point (4,5) mergetol 0
extrude point (5,0) mergetol 0.033414284
extrude edge point 1 2 type simple
extrude edge point 2 3 type simple
extrude edge point 3 1 type simple
extrude block at (2.77879,3.10571)
extrude set segment length 1 5
generate zone extrude