# Make an Example and shaded box like in the book

I want to make Examples in the book as in the following book

http://www.analogmachine.org/Books/Chapter1.pdf

See Page 2...

Also shaded box as in the page 3... Pictures can be seen below.

Minimal Code for the First part of the Question.

\documentclass{book}

\usepackage{amsthm,color}
\theoremstyle{definition}
\newtheorem{exinn}{Example}[chapter]
\newenvironment{example}
{\clubpenalty=10000
\begin{exinn}%
\mbox{}%
\mbox{}\linebreak\ignorespaces}
{\par\kern2ex\hrule\end{exinn}}

\begin{document}
\chapter{Chapter One}
\section{Section One}

\begin{example}
What is $a^2 - b^2$?

$a^2 - b^2 = (a - b) \times (a + b)$
\end{example}

\end{document}

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Welcome to TeX.sx! I think it would be better if you split your question in two because this site works best if you ask one question at the time. Also please provide screenshots of the entities you want to produce. –  N.N. Dec 15 '11 at 7:28
In my eyes these both questions are ok for on post … I added an example as answer but in the future it would be good if you try it yourself first an then post your code. Otherwise it looks like „I need XXX build it for me!” which is not relay nice ;-) Furthermore a better title is recommended, like “Framed boxes width round corners or tile on the frame” … –  Tobi Dec 15 '11 at 8:19
Is the source code for this book available somewhere? –  Village Dec 15 '11 at 22:56

Update
I included @Marco’s code (setting the title with frametitlefont to be able to add an extra headline to each environment) and implemented an unnumbered version for examples (example*)

Have a look at the mdframed package.

\documentclass{scrartcl}

\usepackage[framemethod=TikZ]{mdframed}
\usepackage{xcolor}

% EXAMPLES
%% set the counter for your environment
\newcounter{example}
\renewcommand{\theexample}{\thesection.\arabic{example}}

%% define the style
\mdfdefinestyle{example}{%
linecolor=blue,
outerlinewidth=2pt,
bottomline=false,
leftline=false,rightline=false,
skipabove=\baselineskip,
skipbelow=\baselineskip,
frametitle=\mbox{},
}
%% setup the environments
%%% with number
\newmdenv[%
style=example,
settings={\global\refstepcounter{example}},
]{example}
%%% without number (starred version)
\newmdenv[%
style=example,
]{example*}

% BOXES
%% set up the environment
\newmdenv[%
backgroundcolor=red!8,
linecolor=red,
outerlinewidth=1pt,
roundcorner=5mm,
skipabove=\baselineskip,
skipbelow=\baselineskip,
]{boxed}

% for testing
\usepackage[english]{babel}
\usepackage{blindtext}

\begin{document}
\section{Section One}
\blindtext
\blindtext
\end{example}
\blindtext
\begin{example*}[frametitle=Foobar baz]
\blindtext
\end{example*}
\blindtext
\begin{example}
\blindtext
\end{example}
\blindtext
\begin{boxed}
\blindtext
\end{boxed}
\blindtext
\end{document}


The manual shows an example putting the title on the frame …

-

TIKZ MWE:

\documentclass{article}
\usepackage{tikz}
\usepackage[english]{babel}
\usepackage{blindtext}
\newcommand{\mybox}[2]{%
\begin{center}%
\begin{tikzpicture}%
\node[rectangle, draw=#2, top color=#2!10, bottom color=#2!90, rounded corners=5pt, inner xsep=5pt, inner ysep=6pt, outer ysep=10pt]{
\begin{minipage}{0.75\linewidth}#1\end{minipage}};%
\end{tikzpicture}%
\end{center}%
}
\begin{document}
\blindtext
\mybox{\blindtext}{green}
\blindtext
\mybox{\blindtext}{red}
\end{document}


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@Marco Daniel how can we change the colour at the very next paragraph? I mean i want to have a green backround here and a pink after that. How can we do this possible?? –  Giannis Mar 13 at 21:17
@Giannis I updated the code with your request. –  Arianna Mar 21 at 9:18

\usepackage{amsthm,color}
\theoremstyle{definition}
\newtheorem{exinn}{Example}[chapter]
\newenvironment{example}
{\clubpenalty=10000
\begin{exinn}%
\mbox{}%

We can use the package tcolorbox by Thomas F. Sturm.