How to delete the texts created with the "comment (ugly)" block

[XYON126]

How to delete the texts created with the "comment (ugly)" block after a stipulated time, for example after one minute or by pressing a button. Thanks a lot.

[miro1360]

https://fxdreema.com/shared/Uc12vDNVd

[XYON126]

@miro1360 THANK YOU VERY MUCH.

[l'andorrà]

@miro1360 I'm afraid I don't get it. Where is the 'deleting' option?

[miro1360]

you write the empty comment