M106; (turn extruder fan on)
M104 S220; (set extruder temperature to 220C, change for higher of lower temps)
M105; (get extruder temperature)
M109 S220; (set extruder temperature to 220C and wait for temp)

M82; (enable absolute extrusion mode)
G21; (enable metric values)
G90; (enable absolute positioning)
G92 E0; (Reset the extruder to 0)

G92 E0
G0 F1500; (Set the feedrate to 1500mm/minute. Change for faster or slower rates)

G1 E500
G1 E1000
G1 E1500
G1 E2000
G1 E3000
G1 E4000
G4 S600; (wait for 600 seconds) 

M84;(Turn off stepper motors.)
M104 S0;(Turn off nozzle, don't wait)