yuanchuan

const assert = require('assert');

const cons = (a, list) => _cons => _cons(a, list);
const car = list => list(head => head);
const cdr = list => list((_, tail) => tail);
const nil = () => null;
const is_nil = list => car(list) === nil();

const length = list =>
  is_nil(list) ? 0 : 1 + length(cdr(list));

yuanchuan

const MARK = {
  symbol: {
    name: '__mark__',
    type: 'condition',
  },
  add(fn) {
    let { name, type } = this.symbol;
    let addon = { [name]: type };
    return Object.assign((...args) => fn(...args), addon);
  },

yuanchuan

<css-doodle>
   :doodle {
      @grid: 20x1 / 60vmin;
      overflow: hidden;
    }
    :container {
      transform: scale(25);
      filter: @svg-filter(<svg>
        <filter>
          <feTurbulence baseFrequency="@r(.016, .056, .001)" seed="@r(100)" numOctaves="@r(8, 15)" />

yuanchuan

<main></main>