Highlight tabulated and trailing whitespace

[steve-humphreys]

I would like to highlight tabulated and trailing whitespace, using the following
code on a dark background.  The highlighting is not working.  I might also be
changing tabs with spaced but do not what command I had used.

(defun whitesp-highlight ()
  "Highlights whitespace."

  (require 'whitespace)
  (setq-local show-trailing-whitespace t)

  (whitespace-mode)
  (setq whitespace-style '(face tabs))
  (modify-face whitespace-tab nil "#000000")

  ;; Highlights tabulator regions
  (setq whitespace-style '(tabs tab-mark))
  (global-whitespace-mode 1) )