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\documentclass{article}
\usepackage{lisp-on-tex}
\lispinterp{%
%rocket body
(\define \rocket
(\letM ((\count :11))
(\lambda ()
(\begin
(\setB \count (\- \count :1))
(\lispif (\< \count :0)
(\texprint '{\small fired...}\\')
(\lispif (\= \count :0)
(\texprint '{\Large FIRE!}\\')
(\texprint (\concat 'count ' (\intTOstring \count) '...\\'))))))))
(\define \MAX :15)
%LOOP function
(\define \loop
(\lambda (\n)
(\lispif (\= \n \MAX)
()
(\begin (\rocket) (\loop (\+ \n :1))))))
}
\begin{document}
\noindent\lispinterp{(\loop :0)}
Test done.
\end{document}
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