Thanks, Paul, you got it right. I was trying to do it all in one 
file/page. I'll have a go at your suggestion.

> I might be reading this wrong, but I do not think you should put your
> meta refresh request in the png creation script.  It should be in the
> html body script.

> Index.php
> ========================
> Meta-refresh to call itself in 30 secs
> Call to <img src="php_radio_image_creation_script.php">

> php_radio_image_creation_script.php
> ========================
> header("Content-type: image/png") 
> Echo image content

> -Paul

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