Script to generate pop up in field and form rules

Script to generate pop up in field and form rules

Hi team.

I need to create a script in field and form rules, showing a pop up when the technical field is updated. 

I created a script where I can execute this action by comparing two date fields, but I haven't been able to create the script by updating the technical field.

Can you help me with this?

Thanks and Regards!!

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