Hello Bee Prusa DIY 3D PRINTER KIT User Manual page 7

Follow these screenshots and copy the following commands.
USE THE FOLLOWING COMMANDS FOR START.GCODE:
;Basic settings:
;Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
;Print time: {print_time}
;Filament used: {filament_amount}m {filament_weight}g
;Filament cost: {filament_cost}
M140 S{print_bed_temperature} ;bed temperature line
M109 S{print_temperature} ;temperature line
G21 ;metric values
G90 ;absolute positioning
M107 ;start with the fan off
G28 ;move X/Y/Z to min endstops
G92 E0 ;zero the extruded length
G1 F200 E3 ;extrude 3mm of feed stock
G92 E0 ;zero the extruded length again
G1 F{travel_speed}
;Put printing message on LCD screen
M117 Printing
M420 S1
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