Background Task in Classic ASP 11

I am building a project using Classic ASP (mainly because I already have a lot of stuff written in Classic ASP over the years) on a shared hosted server

I need a simple way of running something in the background. So, maybe once per minute it looks at the state of the Database and sends appropriate emails to people

The fact it is on a shared hosted server limits what I can do in practice - any suggestions how I can do this?

Many thanks