Help, I need a simple timer to beep every 20 minutes

[PLOlover]

Hi, I need a simple timer program or .vbs file or anything to beep every 20 minutes so I don't get eyestrain.

I know it can be done very easily in windows scripting but I don't know how to do it.

If I have to I can code it but that would mean installing visual basic or visual c++ or something and that is such a pain in the butt I was just wondering if anybody out there could do it for me or point me to a vbs tutorial or something.

Thanks.