\version "2.12.2"
\score {
    % Set up the one-line drum staff
    \new DrumStaff \with{
      drumStyleTable = #percussion-style
      \override StaffSymbol #'line-count = #1
      \override BarLine #'bar-size = #3
    }
    
    % The rhythm
    \drummode {
        r4 cl8 r8 cl8 r4. cl8 r8 r8 cl8 r8 r8 cl8 r8
    }

    % Output specification
    \layout {}
    \midi {
      % Set tempo of output midi file to 180 bpm
      \context { \Score tempoWholesPerMinute = #(ly:make-moment 180 4) }
    }
}