Automatic Whatsapp msg from Google Sheets through "app.messageautosender.com"

I am registered on "app.messageautosender.com" I want to send automatic message through the Google Sheet. I want someone who can right the code in Google App Script for this purpose.

I have shared sample Sheet (llink mentioned below) aand Code sample is also mentioned there.

https://docs.google.com/spreadsheets/d/1B332Zr6aia4AjYJ3ftRDpuxpxlPIMUFsDNVEZA1VDqI/edit#gid=0