Pahzlg

G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
M107 ;start with the fan off
G1 Z25.0 F9000 ;move the platform down 15mm
G28 X0 Y0 ;move X/Y to min endstops
G32         ;Probe Z and calculate Z plane
G92 Z23.25  ;Offset Z
G1 X100 Y0  F8000 ; Avance avant bed
G4 P1000   ; wait 1 second (see comment below)
G92 E0                  ;mise a zéro extrudeuse
G1 F600 E20         	;extrude 20 mm
G92 E0                  ;mise a zéro extrudeuse
G1 F600 E-1         	;retract extrudeuse 1mm
G92 E0                  ;mise a zéro extrudeuse

M104 S0 ;extruder heater off
M140 S0 ;heated bed heater off (if you have it)
G91 ;relative positioning
G1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure
G1 Z+0.5 E-5 X-20 Y-20 F9000 ;move Z up a bit and retract filament even more
G28 X0 Y180 ;move X/Y to min endstops, so the head is out of the way
M84 ;steppers off
G90 ;absolute positioning
M81 ;Power ATX OFF