Add "What you sould know now" section

VL1.tex

@@ -659,7 +659,17 @@ For haskell IDEs, see \url{https://wiki.haskell.org/IDEs}
 \item the standard module (similar to libc in C):\\ \url{https://hackage.haskell.org/package/base-4.7.0.0/docs/Prelude.html}
 \item debugging in haskell:\\ \url{https://wiki.haskell.org/Debugging}
 \end{itemize}
+\end{frame}
 
+\begin{frame}
+\frametitle{What you should know now}
+\begin{itemize}
+\item what haskell is
+\item how you write haskell functions
+\item how you handle lists and pairs
+\item how you do pattern matching
+\item how you create your own data types
+\end{itemize}
 \end{frame}
 
 \begin{frame}