Mach3 Using a physical button to repeat current gcode

Hi All,
Is it possible to use a button connected to an input pin to repeat the current loaded gcode in mach 3.
I have looked through the oem lists for a trigger and tried various M and G codes but can't seem to get anything to work.

Thanks in advance for any help

Unless I'm missing something use g28 and g30 at the end of the code then press start button again ?

Working now thanks for the super quick reply.