im making a cnc machine using cd drive stepper motor.

[Hariyeaon]

this is the thing shown when i send a gode file in universal g code sender.
im using A4988 module, cd drive stepper motor, 12 v power supply 1.5 amp, arduino uno, cnc sheild.
kindly help me

Skipping command #1
Skipping command #2
Skipping command #13
Skipping command #55
Skipping command #80
Skipping command #101
Skipping command #117
Skipping command #154
Skipping command #185
Skipping command #204
Skipping command #214
Skipping command #224
Skipping command #245
Skipping command #260
Skipping command #287
Skipping command #298

G90
G21
G90
G92X0.00Y0.00Z0.00
ok
ok
0S30
G4P150
0S50
G4P150
M18
M01
M17
ok
ok
G1X0.56Y24.27F3500.00
0S30.00
G4P150
G1X1.59Y24.54F3500.00
G1X1.96Y22.50F3500.00
error: Expected command letter

[winder]

What is 0S30 supposed to do? Is that in your original gcode file?