Custom Field like Address with Plus Button like Phone

[tanya]

Hi,
useful links

https://www.espocrm.com/documentation/development/custom-field-type/

https://forum.espocrm.com/forum/developer-help/32276-how-to-create-custom-field-type-with-add-button-and-currency-symbol

[jaydipc]

Hello All,

I need to create a custom group field (Diligence) like Address field which consists of Month (varchar) field and some amount (Balance, Overdrafts, Deposits) (float) fields. There should be a plus button below the Diligence field, like Phone or Email field types, which when clicked the group field should be repeated.

I need some help here. How do I create that field? In which folders should I store the source codes? A step by step guidance would be appreciated.

Thanks.