Not much I can tell you about this one, but here's what there is:
text The text to be scrolled. If you want to use one of the background effects by itself, just remove everything between the "quote-signs".
bgcolor Choose the applet's nackground colour in rrggbb (hex) format.
fgcolor The primary colour of the scrolling text.
tface Choice of typeface. Use C for Courier, T for TimesRoman. (There may be more, but 'H' for Helvetica doesn't work!)
bgeff2 Changes the background effect. Three choices that I could find: g, b and o.
ecol1 Changes the colour of the background effect (bgeff2) in rrggbb (hex) format.