T0
M116 ; wait for hotend temp
G1 E20 F500 ; Extrude 10mm slowly
G1 E-100 F1500 ; Retract 100mm faster
G10 R0 S0 ; set hotend temperature (R is standby)
M300 S1000 P100 ; beep
M84 E0 ; turn extruder motors off