This a simple script that will create a few MIDI files with a slight variation each time you run it with nodejs on the terminal

scribble-drummer.js

// Make sure you have Node version 8+ installed locally and you have run `npm install scribbletune` before running this script
const scribble = require('scribbletune');

const ptn = 'xxxx'.repeat(7);
const A = 'xxx[x[RR]]';
const B = 'xx[x[RR]][x[RR]]';
const C = 'x-[x[RR]]';
const kick = scribble.clip({
  pattern: ptn + A + ptn + B + ptn + A + ptn + C,
  notes: 'c4',
});

scribble.midi(kick, 'kick.mid');

const ch = scribble.clip({
  pattern: '[xR][[x[xR]]]'.repeat(16),
  notes: 'c4',
  sizzle: 'sin',
  sizzleReps: 32,
});

scribble.midi(ch, 'ch.mid');

const bass = scribble.clip({
  notes: 'Bb2',
  pattern: '[-xRx][-xRR][-xRx][-xxR]'.repeat(2),
  randomNotes: scribble.scale('Bb2 minor').slice(1),
  accent: '--x-',
});

const bassEnd = scribble.clip({
  notes: 'G#2',
  pattern: '[-xRx][-xRR][-xRx][-xxR]'.repeat(2),
  randomNotes: scribble.scale('Bb2 harmonic minor').slice(2, 5),
  accent: '--x-',
});

scribble.midi(bass.concat(bassEnd), 'bass.mid');

const sA = '-x-x';
const sB = '-[xR]-[Rx]';
const snare = scribble.clip({
  notes: 'c4',
  pattern: (sA + sA + sB + sA + sA + sB + sA + sA).repeat(4),
});

scribble.midi(snare, 'snare.mid');

const oh = scribble.clip({
  notes: 'c4',
  pattern: '[-x][Rx][Rx][Rx]'.repeat(8),
});

scribble.midi(oh, 'oh.mid');