How can I create a bot that runs on a website and continually tries a digit till it finds the right one.

From 0000 tot 9999?

Any tutorials on this

I assume that you want a bot that runs on your computer and connects to a web site to do stuff . . . for that, use vbscript and the internet explorer object . . . google it . . you wil find a lot of examples.

no luck so far

What would this bot be doing, aside from trying digits?

I could paste a quickie snippet if you supplied more information.

sounds like you're trying to bruteforce a form?