Please check out this post: Please Read This First: Guidelines and Suggestions for posting LAMMPS questions
It explains basic guidelines for posting here and that includes how to properly typeset quoted text, so that it is properly readable. Yours is not. Didn’t you notice??
If you want a assign a non-uniform charge, you need to replace “1e-15” in
set group all charge 1e-15
with a reference to an atom style variable that uses and expression based on either the “normal()” function to create a random gaussian distribution, or some other expression that would compute the charge for the individual atom based on its position in the box or similar. Please see the documentation for the “set” and the “variable” commands for details.