\begin{tikzpicture}
\draw (0,0) rectangle (5,5);
\alt<2> {\draw (0,0) -- ++(5,5) -- ++(-2.5, 2.5) -- ++(-2.5, -2.5) -- (5,0);}
{\draw (0,0) -- ++(5,5) ++(-5, 0) -- ++(5,-5);}
\end{tikzpicture}
Generated by dwww version 1.15 on Sat May 18 13:04:43 CEST 2024.