I know how to create a grid by using TikZ and the following:
\documentclass[a4paper,10pt,table]{book}
\usepackage{tikz}
\usetikzlibrary{arrows,plotmarks}
\def\quadrill#1{\smallbreak\textcolor{gray} {\setlength\unitlength{5mm}\begin{picture}(36,#1)
\multiput(0,0)(1,0){37}{\line(0,1){#1}}
\put(0,0){\line(1,0){36}}
\multiput(0,1)(0,1){#1}{\line(1,0){36}}
\end{picture}}\medbreak}
\newenvironment{Quadrill}[1]{\quadrill#1}{}
\begin{document}
\Quadrill{12}
\end{document}
My aim is now to add a counter, for example a big number in the upper left corner area of my grids. Unfortunately, I am not able to adapt the previous code.
