How to create a bubbles.

Please give more info and an example.
What do you mean with reply to files?

@Mario Barretta Thank you very much for your reply. I have completed the effect by learning source code knowledge.Something like this

nice.
i'm happy that you have found a solution also if i do not found that bubble on my dashboard (that's in english)
What is that bubble?

This is my own reference source code to write a bubble, to meet the needs of the project. (I am a Chinese)😎