diff --git a/lh-lecture/lh-exercise.cls b/lh-lecture/lh-exercise.cls
new file mode 100644
index 0000000..be3d7d7
--- /dev/null
+++ b/lh-lecture/lh-exercise.cls
@@ -0,0 +1,98 @@
+%% Copyright (C) 2017 Achim D. Brucker, https://www.brucker.ch
+%%
+%% License:
+%%   This program can be redistributed and/or modified under the terms
+%%   of the LaTeX Project Public License Distributed from CTAN
+%%   archives in directory macros/latex/base/lppl.txt; either
+%%   version 1 of the License, or any later version.
+%%   OR
+%%   The 2-clause BSD-style license.
+%%
+\NeedsTeXFormat{LaTeX2e}[1994/06/01]
+\ProvidesClass{lh-exercise}%
+  [2016/12/28 v0.0  LaTeX class for home work / exercise sheets
+  followign the  cooperate design of LogicalHacking.com]
+  
+\PassOptionsToClass{\CurrentOption}{scrartcl}
+\LoadClass[DIV11, 11pt,a4paper]{scrartcl}[]
+
+\DeclareOption{noanswer}       {\PassOptionsToPackage{noanswer}{exercise}}
+\DeclareOption{answeronly}     {\PassOptionsToPackage{answeronly}{exercise}}
+\DeclareOption{noexercise}     {\PassOptionsToPackage{noexercise}{exercise}}
+\DeclareOption{exerciseonly}   {\PassOptionsToPackage{exerciseonly}{exercise}}
+\DeclareOption{outputnothing}  {\PassOptionsToPackage{outputnothing}{exercise}}
+\DeclareOption{exercisedelayed}{\PassOptionsToPackage{exercisedelayed}{exercise}}
+\DeclareOption{answerdelayed}  {\PassOptionsToPackage{answerdelayed}{exercise}}
+\DeclareOption{lastexercise}   {\PassOptionsToPackage{lastexercise}{exercise}}
+\DeclareOption{showlabel}      {\PassOptionsToPackage{showlabel}{exercise}}
+
+\ProcessOptions\relax
+
+\usepackage[T1]{fontenc}
+\usepackage[default]{raleway}
+\usepackage{fontawesome}
+
+\usepackage{lh-logo}
+\usepackage[some]{background}
+\usepackage{tikz}
+\usepackage{exercise}
+\usepackage{hyperref}
+%
+\makeatletter
+\def\lh@handin{}
+\newcommand{\handindate}[1]{\gdef\lh@handin{#1}}
+\def\lh@discusion{}
+\newcommand{\discussiondate}[1]{\gdef\lh@discussion{#1}}
+\def\lh@lecture{}
+\newcommand{\lecture}[1]{\gdef\lh@lecture{#1}}
+\def\lh@academicyear{}
+\newcommand{\academicyear}[1]{\gdef\lh@academicyear{#1}}
+\def\lh@topic{}
+\newcommand{\topic}[1]{\gdef\lh@topic{#1}}
+\def\lh@sheetnumber{}
+\newcommand{\sheetnumber}[1]{\gdef\lh@sheetnumber{#1}}
+
+\backgroundsetup{
+  scale=1,
+  angle=0,
+  opacity=1,
+  contents={\begin{tikzpicture}[remember picture,overlay]
+    \path [fill=lhLightGray] (-0.5\paperwidth,0.5\paperheight) rectangle (0.5\paperwidth,0.5\paperheight-125);
+    \path [fill=lhOrange] (-0.5\paperwidth+20,0.5\paperheight) rectangle (0.5\paperwidth-20,0.5\paperheight-12);
+    \draw (-0.5\paperwidth+15,0.5\paperheight-115) node [anchor=base west] {\lhcomLogoLight[width=.25\paperwidth]};
+    \draw (0,0.5\paperheight-30) node {\textcolor{lhBlack}{\huge\bfseries\lh@lecture}};
+    \draw (0,0.5\paperheight-53) node
+    {\textcolor{lhBlack}{\ifx\lh@sheetnumber\@emtpy\else Home Work
+        Sheet \fi\lh@sheetnumber}};
+    \draw (0,0.5\paperheight-70) node {\textcolor{lhBlack}{\Large\bfseries\lh@topic}};
+    \draw (0.5\paperwidth-15,0.5\paperheight-115) node [anchor=base east]
+    {\begin{minipage}[b]{.6\linewidth}
+    \flushright\small
+    \textbf{Academic year:} \lh@academicyear\\
+     \ifx\lh@handin\@empty\else%
+       \textbf{Hand-in date:} \lh@handin\\
+      \fi%
+     \ifx\lh@discussion\@empty\else%
+       \textbf{Discussion date:} \lh@discussion
+     \fi
+  \end{minipage}};
+    \end{tikzpicture}}
+}
+
+\renewcommand{\maketitle}{
+  \BgThispage%
+  \vspace*{1.4cm}
+  }
+
+\def\DifficultyMarker{\faStar}
+\renewcommand{\ExerciseHeader}{%
+  \noindent\bfseries\ExerciseName~%
+  \ExerciseHeaderNB~{\slshape\ExerciseHeaderTitle}~\ExerciseHeaderOrigin \hfill
+  \ifx\ExerciseHeaderDifficulty\@empty\else(\ExerciseHeaderDifficulty\kern-.5ex)\fi\\}
+\renewcommand{\AnswerHeader}{\bigskip\noindent\bfseries Answer to \ExerciseName~\ExerciseHeaderNB\\}
+
+\newcommand{\sidemark}[1]{\mbox{}\marginpar[\small\raggedleft\hspace{0pt}\textcolor{lhOrange}{#1}]{\small\raggedright\hspace{0pt}\textcolor{lhOrange}{#1}}}
+\newcommand{\key}[1]{#1\sidemark{#1}}
+
+
+\endinput