How to make an alloy

Dear users,

In LAMMPS, I want to make crystal of Si/Ge alloy [e.g, Si (x%) and Ge (1-x%) with random distribution ] . I can’t understand from doc page how to set the commands to get the crystal. Please share your idea if anybody have.

Thanks & Regards

You can use the set type/fraction command to change
some fraction of atoms to a new type (e.g. Ge).