\documentclass{beamer}
\usepackage{listings} % Source code
+\usepackage{subcaption} % Subcaptions
\usepackage[nodayofweek]{datetime} % Use a fixed document date
% Images directory
breaklines=true,
captionpos=b,
keepspaces=true,
- basicstyle=\ttfamily\fontseries{l}\footnotesize,
+ basicstyle=\ttfamily\fontseries{l}\scriptsize,
commentstyle=\slshape\fontseries{m},
keywordstyle=\bfseries\fontseries{b},
stringstyle=\ttfamily,