Don't forget to paste the html codes of modals on the html page you want to use.
You can show with
You can set the delay to show the modal.
This code shows the modal after 3 seconds. Change according to what you want.
Show the modal only once to users.
This code shows the modal after 3 seconds. it works only once, does not disturb users. Note: you must define the delay, otherwise It will not work.