%
(1" square with 1/4"r corners)
G90 G54 G20
G64
G0 X0 Y.25 Z.25
z0
G1 Y.75 F999
G2 X.25 Y1 I.25
G1 X.75
G2 X1 Y.75 J-.25
G1 Y.25
G2 X.75 Y0 I-.25
G1 X.25
G2 X0 Y.25 J.25
G0z.25
M30