docs: function BuildLight(opts) {
    const RGB = [ 'red', 'green', 'blue' ];
    const INTERVAL = 500;
    const GEN = 1;
  
    this.opts = opts || {};
    this.scheme = this.opts.scheme || RGB;
    this.interval = this.opts.interval || INTERVAL;
    this.platform = this.opts.platform || process.platform;
    this.gen = this.opts.gen || GEN;
  
    this._driver();
    this._colours();
  }