\begin{algorithm} \caption{Unbiased Random 0-1 Generator} \begin{algorithmic} \WHILE{\TRUE} \STATE $a =$ \CALL{BiasedRandom}{} \STATE $b =$ \CALL{BiasedRandom}{} \IF{$a \ne b$} \RETURN $a$ \ENDIF \ENDWHILE \end{algorithmic} \end{algorithm}