diff --git a/presentation/images/qr.png b/presentation/images/qr.png
new file mode 100644
index 0000000..c062e62
Binary files /dev/null and b/presentation/images/qr.png differ
diff --git a/presentation/presentation.tex b/presentation/presentation.tex
index f613a12..79d6ed7 100644
--- a/presentation/presentation.tex
+++ b/presentation/presentation.tex
@@ -84,10 +84,22 @@ compress
 \begin{frame}{First things first}\framesubtitle{Hardwareausgabe}
 \begin{itemize}
 	\item Verfügbare Sets: 20
-	\item Reserviert: ~15
+	\item Reserviert: ~19
 	\item Kosten: \EUR{8} pro Set
+	\begin{itemize}
+		\item Bank of WIAI
+		\item \url{https://www.paypal.me/clkl/8}
+		\item Cash
+	\end{itemize}
 \end{itemize}
+\begin{figure}[H]
+%\centering
+%\flushright
+\includegraphics[width=.3\textwidth]{qr}
+\label{img:qr}
+\end{figure}
 \end{frame}
+
 \begin{frame}{Content}
 \tableofcontents
 \end{frame}
@@ -271,7 +283,7 @@ Starten:
 \begin{lstlisting}[caption={HTTP Requests},label=http]
 import urequests
 host = "http://your.host.ip.here:5000"
-response = urequests.get(host)q
+response = urequests.get(host)
 print(response)
 
 import machine
@@ -291,6 +303,7 @@ urequests.post(post_url, data=data, headers=json_header)
 \end{frame}
 \begin{frame}[fragile]{LEDs}
 \setbeamercovered{invisible}
+\lstset{tabsize=6}
 \begin{lstlisting}[caption={LED},label=led,escapeinside={(*@}{@*)}]
 import machine, time, math
 pin = machine.Pin(0, machine.Pin.OUT)