A picture paints a thousand words.... but keep it small. Remember the attention span of the average visitor (7 seconds), and the type of computer/modem setup they'll have.
Don't use sound - it's still considered naff, and be careful with Java. It has its uses, but can be gimmicky. And Java script, contrary to popular belief, CAN hide viruses.
If you want a look at a modest! effort, I can point you no further than:
http://www.aspect2000.co.uk
OR
http://www.aspect2000.co.uk/accident
Cheers ;-)
------------------
PistonBroke