Interval and confirm

Hi, I’m very very new with javascript for in pdf document. I need a small javascript in my pdf file for next issue: As soon as I open a pdf document, a timer must startup, after x-seconds an app.alert must appears with 2 option button. This 2 buttons are OK and Cancel. Click on OK must navigate too my website.
3 in 1:
-timer function,
-app.alert windows,
-go-to-URL
What I have tried, no result for this script. The problem is I can’t combines more scripts in one script. I can find separate timer function, app.alert function and go-to-url function on this site. But I can't put these 3 different issues in one script.