code: function(fc, colors, style){
      var normals = normalize(colors.length)
      _.each(fc.features, function(f){
        var rand = Math.floor(Math.random()*colors.length)
        var colorHex = chroma(colors[rand]).hex()
        f = setColor(f, colorHex)
      })
      fc = applyStyle(fc, style)
      return fc
    }
docs: RANDOM