Generating new variables based on all values of an existing variable and another condition

I have a dataset of individuals that can be lenders and borrowers. A simple example of my data set is as follows:


Here, the variable lending =1 if the individidual is a lender. I want to create 12 new variables (each individual as a lender or a borrower), that takes on a value of 1 if the individual is a lender in the observation being considered (and 0 for all other observations). I have been trying different variations of the forval command, to no avail. Any help is much appreciated.