This for you will need to work with → setInterval() ←
The following example is very old and surely do not consists of best coding, but it works, so i think this could help you out…
https://russian-dima.wixsite.com/meinewebsite/test-1
And next time → please open your own new post and if needed you always can connect other already known posts a links, to provide more information, regarding your issue.
'Godd luck!