TikZ Libraries To provide simpler methods to create complex structures libraries for TikZ has \usetikzlibary Different examples are: decorations.fractals, arrows, backgrounds, intersections and shapes.geometric. And now for some examples using these... First you must add \usetikzlibrary{backgrounds} to your preamble \begin{tikzpicture} [background rectangle/.style={fill=blue!20, draw=blue!50,line width=3pt}, show background rectangle] \draw[line width=2pt,color=gray] (2,2) circle[radius=1]; \end{tikzpicture} First you must add \usetikzlibrary{backgrounds} to your preamble \begin{tikzpicture} [background rectangle/.style={fill=blue!20, draw=blue!50,line width=3pt}, show background rectangle] \draw[line width=2pt,color=gray] (2,2) circle[radius=1]; \end{tikzpicture} First you must add \usetikzlibrary{backgrounds} to your preamble \begin{tikzpicture} [background rectangle/.style={fill=blue!20, draw=blue!50,line width=3pt}, show background rectangle] \draw[line width=2pt,color=gray] (2,2) circle[radius=1]; \end{tikzpicture} Koch Snowflake First you must add \usetikzlibrary{decorations.fractals} to your preamble \begin{tikzpicture}[decoration=Koch snowflake,draw=blue,fill=blue!20,thick] \filldraw decorate{ decorate{ (0,0) -++(60:1) -- ++(-60:1) -- cycle}}; \end{tikzpicture} Koch Snowflake First you must add \usetikzlibrary{decorations.fractals} to your preamble \begin{tikzpicture}[decoration=Koch snowflake,draw=blue,fill=blue!20,thick] \filldraw decorate{ decorate{ (0,0) -++(60:1) -- ++(-60:1) -- cycle}}; \end{tikzpicture} Koch Snowflake First you must add \usetikzlibrary{decorations.fractals} to your preamble \begin{tikzpicture}[decoration=Koch snowflake,draw=blue,fill=blue!20,thick] \filldraw decorate{ decorate{ (0,0) -++(60:1) -- ++(-60:1) -- cycle}}; \end{tikzpicture} Don’t forget At the end of each statement put a semi-colon. Don’t forget to put the correct TikZ library in your preamble. Resources PGF Manual TikZ Examples Extra TikZ slides Homework Thank You!