Delayed triggered email on corvid is possible?

what code should i use to create a kind of automation that sends 3 emails after 1 day each?

First you should insert the event and the event time to your database.
You should write a scheduled job, that checks the database every 24 hours and sends an email if the current time - the log time > 24 hours.

See:
https://support.wix.com/en/article/corvid-scheduling-recurring-jobs

Thanks