Scroll though all <strong> tags and make the bold/not bold

Scroll though all <strong> tags and make the bold/not bold

Hi all.
 
Have looked on the forum but could not find an answer.
 
Have a site with various <strong> tags.
The css has font-weight:normal; for these.
 
I'm try to write some jquery code to:
start at the first <strong> tag...
make it bold...
wait 2 seconds...
make it normal...
and move on to the next <strong> tag.
 
I think this would be a neat effect.
 
If anyone has any idea how to do this, I would very much appreciate your help!
 
David