Chat style, how to make chat bubbles as WhatsApp

[nlerdafehn]

Good evening forum,

I am trying to generate an internal chat in a company, and I would need the visual of the messages to be shown in this way:

[img] https://i.ibb.co/2jbyHmn/image.png [/ img]

I understand php, html and CSS much better and doing it in that language is quite simple, but here I do not have any idea of how I could implement it.

Can someone guide me where I should look?

Thank you