% $Id: ff,v 1.2 2004/09/19 21:47:11 karl Exp $
% Public domain.
vardef C.ff(expr n) =
 save p;
 picture p; p="f"infont n;
 addto p also "f"infont n shifted(xpart urcorner p-fontsize n/20,0);
 p enddef;
