I share this view. Of course, adding a line <use href="#line[N+1]" y="30" id="lineN" filter="url(#rule110)" /> is trivial, this basically translates to

I share this view. Of course, adding a line <use href="#line[N+1]" y="30" id="lineN" filter="url(#rule110)" /> is trivial, this basically translates to result[N+1] = rule110(result[N]) in any imperative pseudo code. It is lacking a simple loop, but that's the point.