diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,2 +1,13 @@
 # diagrams
 Tikz diagrams
+
+* Examples: [PetarV-/TikZ](https://github.com/PetarV-/TikZ)
+* PDF resources:
+  * [Walcak](https://www.tug.org/TUGboat/tb29-1/tb91walczak.pdf)
+  * [Cremer](https://www.cremeronline.com/LaTeX/minimaltikz.pdf)
+* Overleaf resources:
+  * https://www.overleaf.com/learn/latex/LaTeX_Graphics_using_TikZ%3A_A_Tutorial_for_Beginners_(Part_1)%E2%80%94Basic_Drawing
+  * https://www.overleaf.com/learn/latex/TikZ_package#Introduction
+* other resources:
+  * [tikz.dev](https://tikz.dev/tutorials-guidelines)
+  * [tikz.netlify.app](https://tikz.netlify.app/)
diff --git a/diagram.tex b/diagram.tex
new file mode 100644
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+++ b/diagram.tex
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+% https://tex.stackexchange.com/a/51766
+\documentclass[crop,tikz,convert={outext=.svg,command=\unexpanded{pdf2svg \infile\space\outfile}},multi=false]{standalone}[2012/04/13]
+
+%\usetikzlibrary{...}% tikz package already loaded by 'tikz' option
+
+\makeatletter
+
+\begin{document}
+
+\begin{tikzpicture}
+
+  \draw (0,0) -- (10,10); % ...
+  \draw (10,0) -- (0,10); % ...
+  \draw (5,0) -- (0,10); % ...
+  \node at (5,5) {Lorem ipsum at domine standalonus};
+
+\end{tikzpicture}
+
+\end{document}