How to load JS after being on the page for a certain amount of time?

I want to have a piece of JavaScript execute after you have been on the page for a certain amount of time, for example, three minutes. I feel like this could be a simple question but I only know some basic JS.

Can anyone help?

 

You can use Javascript's setTimeout() function. Its usage is somewhere in the line of:

setTimeout ( expression, timeout );

Code (markup):

 

Thank you! I'll look into using that function!

 

Yep, if you need help you can paste the code here and say what you exactly want done.