You don't need to understand very much, you can try itself by adding it on extension chrome or firefox (searching in google with keyword; auto refresh extension), just set time in minutes or seconds. and don't forget to click Always stay logged in: on bitcointalk account.

But, what for? there is no reward for mostly logged time. there is mostly cost also, User need also rent a VPS and If doesn't, PC should be online every day (electric cost).