let bassline = null;

  function setInstruments() {

  percussion = function (instr, vel, dur, old) {

    let t = secs(dur);

    let delta = audioClock() - (t + old);

    if(delta >= 0) {

     drums.play(instr,vel)

     setTimeout(percussion.bind(null, instr, vel, dur, audioClock() - delta));

    }

    else setTimeout(percussion.bind(null, instr, vel, dur, old));

  };

​

  bassline = function(note, vel, dur, old) {

    let t = secs(dur);

    let delta = audioClock()  - (t + old);

    if(delta >= 0) {

    bass.play(note, vel);

    setTimeout(bass.stop.bind(bass, note, vel), t*MSEC*0.9);

    note += 7;

    if(note > Bb[3]) note -= 24;

    setTimeout(bassline.bind(null, note, vel, dur, audioClock() - delta));

   } else setTimeout(bassline.bind(null, note, vel, dur, old));

  }

}

function startPattern() {

   let t = audioClock();

   percussion(cymbal, 0.8, 1, t);

   percussion(kick, 0.5, 1.5, t);

   percussion(snare,0.5, 2, t);

   bassline(Eb[3], 0.6, 1, t);

  }

​

 function playPattern(){

   setInstruments();

   startPattern();

 }

​

  function stop() {

    percussion = function () {};

    bassline = function () {};

  }

​

  function setup() {

   setBpm(180);

   start().then(playPattern); 

  }

​

  function draw() {

  }

​

​

​