(...Explanation...)
(Setup code)
G20 G90 G64 G17
(Move to standard initial position)
G0 x0 y0 z0
(Test code begins here)
G0 X1.0 
G0 X0 y1
G0 X-1 Y0
G0 X0 Y-1
G0 X1 Y0
G0 X0 y1
G0 X-1 Y0
G0 X0 Y-1
G0 X1 Y0
G0 X1 Y1
G0 X0 Y0 Z1
G0 X-1 Y1 Z0
G0 X0 Y0 Z-1
G0 X1 Y1 Z0
M2