Seeking custom code for page delay close

[wwonderfull]

How to add a delay 3000 (meaning 3 second delay) on the below given script

window.close();

The target is to open a page and close it in a specific given time after it opens.

[Pablo]

Did you consider using a timer?

[wwonderfull]

Yeah! good idea pablo. Thanks
Although the delay added in this below script is still a riddle.
window.close();

[Pablo]

https://www.w3schools.com/jsref/met_win_settimeout.asp