WinRider is a nice program, which scrolls your colored text on your desktop window.
You can specify the speed of the text, it's vertical position on desktop,change
direction of scrolling - left or right, and select the font of the text,
where you can specify typeface, italic, bold, size of the text & its color.
Now it is possible to select file as source.
WinRider will scroll each string from the file.