Knot for TJ Hitchman's course

TJ_Knots.tex

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{knots,hobby}

\begin{document}
\begin{tikzpicture}[use Hobby shortcut]
\begin{knot}[
  consider self intersections,
%  draft mode=crossings,
  ignore endpoint intersections=false,
  every strand/.style={draw,ultra thick},
  clip width=4,
  flip crossing/.list={3,5,7}
]
\strand ([closed]4,-.25) .. (90:3.5) .. (135:4.5) .. (157.5:3.5) .. (180:4.5) .. (202.5:3.5) .. (225:4.5) .. (-90:3.5) .. (4,.25) .. (-45:4.5) .. (-90:4.5) .. (225:3.5) .. (202.5:4.5) .. (180:3.5) .. (157.5:4.5) .. (135:3.5) .. (90:4.5) .. (45:4.5);
\end{knot}
\end{tikzpicture}
\end{document}