How do i make a simple hole (AutoCAD / DXF2Gcode)

;; The layer of the drawing entity determines the drill or mill
;; description.  Entities on layer 0 are ignored.
;; 
;; The x and y work in the obvious way.  The z dimension determines the
;; cutting depth.  Therefore the z of all entities NOT on layer 0 must be
;; negative.
;; 
;; All cuts made with a particular tool are made in least-depth-first
;; order.
;; 
;; Tools are used in decreasing alphabetic order, so if you have paths on
;; layers named 250-MILL and 125-MILL, it will ask for the 1/4" before
;; the 1/8".
;; 
;; A text of the form "vfeed: [real number]" or "hfeed: [real number]" on
;; a tool layer will set the vertical/horizontal feed for that tool.
;; 
;; A text of the form "peck: [real number]" on a drill layer will set
;; the increment for a peck drill cycle.
;;
;; A text of the form "chip: [real number]" on a drill layer will set
;; the increment for a chip breaking drill cycle.
;;
;; A text of the form "tap: [real number]" on a drill layer will set
;; the thread pitch for a tap cycle.
;;
;; A text of the form "dwell: [real number]" on a drill layer will set
;; the dwell at the bottom of the drill cycle.