Google Sheets Script Editor: Auto email sheet workbook every night

I have a google sheets document that gets updated daily. I also create new tab sheets daily in this workbook. Example: File name: Database Tab: Day 1 Tab: Day 2 Tab Day 3 ... I need somebody to write a script for the Google Doc Script Editor (Attached image) that will allow me to automatically email the entire workbook to an email address every day at a specific time I choose. I have seen scripts online, but these scripts only allow to email a specific tab OR require me to select the newly created tab every time which defeats the purpose. Every day I go into the workbook and create a new Tab for daily data recording. I need the entire workout sent out at the end of the night as "backup." This script should allow me to change the time in which I need it sent out at any time. Beyond allowing me to set which time the sheet is sent. I also need the following options. 1. The Entire workbook should be email directly from the google drive email address that is hosting the file 2. When it is emailed out it should be emailed as an attachment in excel format .xlsx 3. There should be an option to allow me to put a custom subject line