Rotating WallPaper images via a function key

[Pats]

Hi all,
I want some command, trick or a bash script, which may rotate all the PNG files kept in /opt/wallpaper by just pressing the F12 function key. Each PNG file is max 30kb in size and there may be at the most 10 such files.
Presently either I have to do it manually via Control Panel/Wallpaper or have to use some Image Software - which I want to avoid.

Can anybody help ?
Thnks

~Pats

[Rich]

Hi Pats
Check out this thread:
http://forum.tinycorelinux.net/index.php/topic,15022.msg85907.html#msg85907

[Pats]

Oh, so simple ...
Thnks a lot, Rich.

~Pats