Change the background color of a cell programatically

Hello, Airtable community!

I am writing an extension and I want to change the background color of particular cells if they match condition.

For example: There is a Price column and if the price is > 1000 I want this cell to have a red background.  I know there is a Color option on top of the table that do exactly the same. But I want to apply this rule to each table that come in this base for each number fields automatically. 

Thank you in advance!