I'm trying to build a lined form (A4) as per [![WHO Medical Form](https://i.stack.imgur.com/cXJyP.png)](https://i.stack.imgur.com/cXJyP.png)

However I'm finding it hard to get my head around the coordinate system tikz uses...
Right now I'm finding the lines are going the wrong directions..

```
\documentclass[a4paper,12pt]{article}
\usepackage{tikz}
\usepackage[left=5.2cm,top=2cm,right=1.5cm,bottom=2cm,verbose,nohead,nofoot]{geometry}
\usepackage{etoolbox}

\begin{document}
    \thispagestyle{empty}
    \begin{tikzpicture}[remember picture,overlay]
\path (2cm,27cm) node (p2) {};
\path (2cm,1cm) node (p1) {};
\draw (p1) to (p2); 

    \end{tikzpicture}
\end{document}

```

Thanks!

**EDIT**
I did manage to hammer something into shape, but I think the answer below might be more sensible.. particularly as I noticed my A4 page was apparently 30cm tall!

```
\documentclass[a4paper,12pt]{article}
\usepackage{tikz}
\usepackage[left=2cm,top=1cm,right=1cm,bottom=1cm,verbose,nohead,nofoot]{geometry}
\usepackage{etoolbox}
\usepackage{xcolor}

\begin{document}
    \thispagestyle{empty}
    \begin{tikzpicture}[remember picture,overlay]

\node [shift={(-21 cm,-30cm)}]  at (current page.north east)
{%
    \begin{tikzpicture}[remember picture, overlay]

    \path (2cm,1cm) node (p1) {};
    \path (2cm,30cm) node (p2) {};
    \path (0,1cm) node (p3) {};
    \path (21cm,1cm) node (p4) {};
    \path (20cm,1cm) node (p5) {};
    \path (20cm,30cm) node (p6) {};
    \path (2cm,26cm) node (p7) {};
    \path (20cm,26cm) node (p8) {};
    \path (20cm,15cm) node (p9) {};
    \path (21cm,15cm) node (p10) {};
    \path (11cm,26cm) node (p11) {};
    \path (11cm,30cm) node (p12) {};
    \path (2cm,27cm) node (p13) {};
    \path (11cm,27cm) node (p14) {};
    \path (2cm,30cm) node (p15) {};

    \draw (p1.center) to (p2.center);   
    \draw (p3.center) to (p4.center);   
    \draw (p5.center) to (p6.center);   
    \draw (p7.center) to (p8.center);
    \draw (p9.center) to (p10.center);
    \draw (p11.center) to (p12.center);
    \draw (p13.center) to (p14.center);

%draw hole punches to ISO838
    \draw (1.2cm,11) circle (0.6cm);
    \draw (1.2cm,19) circle (0.6cm);

    \draw (2.5cm,26.5cm) node[anchor=west,draw=none]{\Large{Poisons Case Record}};
    \draw (20.5cm,14.5cm) node[anchor=west, rotate=270 ,draw=none]{\Large{Poisons Case Record}};

    %if we have the aust coloured system then this one is it
    %\draw[blue] (20cm,15cm)rectangle (21cm,30cm);

    \end{tikzpicture}

};
    \end{tikzpicture}
\end{document}

```