message: Changing background color
diff: @@ -36,4 +36,5 @@ with open(style_file) as style:
  with open(filename, "a") as html:
  html.write('<style type="text/css">')
  html.write(css)
  + html.write("body { background-color: seashell; }")
  html.write("</style>")
  