Auto Refresh Block?

[GP]

I'm trying to add an html block that auto refreshes a camera shot every 10 seconds.  The code I was given seems to work fine for the cam shot, however, I'm refreshing the entire page each time, instead of just the pic.   

I've been told to use a meta refresh within an iframe. 
<meta http-equiv="refresh" content="10">

Can someone show a noob how to use this properly?  No laughing! 

It's about to drive me nuts.