[themes] Timed image and text display

[Roger]

Hi all.
I really need to display a number of images of the same dimensions on 
the main page, each image should remain for n seconds then be replaced 
by another from the database.

I also need to display some text over the image and change that every n 
seconds.
Is there a module that permits display of images sequentially or  
selected at random from the database?
Is there a module that permits timed text quotes on a page?, once again 
random or sequential.

Failing this can someone point me to some php code that I could modify 
for the above.
It's years since I used php so the whole thing is a significant learning 
curve.

Many thanks
Roger