\begin{saveblock}{repeatel}
    \begin{highlightblock}[linewidth=0.5\textwidth,gobble=8]
        \begin{lemma}
            Lorem ipsum dolor sit
            ... eget dolor.
            
            \begin{proof}
                Aenean massa. Cum
                ... quis enim.
            \end{proof}
        \end{lemma}
    \end{highlightblock}
\end{saveblock}

\begin{frame}
    \frametitle{Code vs \lang,Visual,Visueel,}
    \begin{columns}
        \begin{column}{0.5\textwidth}
            \useblock{repeatel}
        \end{column}
        \begin{column}{0.5\textwidth}
            \includegraphics[width=\linewidth,height=0.8\textheight,keepaspectratio]{\assetdir/latexRepeatEl.pdf}
        \end{column}
    \end{columns}
\end{frame}