\lstdefinelanguage{Maple}
{
    % list of keywords
    morekeywords={
        for, while, do,
        end, return,
        proc, local,
        if, then, elif, else,
    },
    sensitive=true, % keywords are not case-sensitive
    morecomment=[l]{\#}, % l is for line comment
    morecomment=[s]{(*}{*)}, % s is for start and end delimiter
    morestring=[b]", % defines that strings are enclosed in double quotes
    escapeinside={[*}{*]},
    emph={
        mod,
    },
    emphstyle={\bf},
}