\documentclass[preview,12pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary {arrows.meta}
\usetikzlibrary{bending}
\usepackage[a4paper, portrait, margin=1cm]{geometry}

\def\jumpheight{10}
\def\qgap{\rule[-1pt]{1.0em}{.25pt}}

\begin{document}
    <<diagram>>
\end{document}
