Script for changing objects presence based on amount range

Hello,

Is there a way to change an objects presence (either a field or a subhead) based on the entered amount range in a numeric field? 

For example:

-The numeric field amount entered is a range between 1 and 49,999, then "Signature Subhead 1" appears.

-The numeric field amount entered is a range between 50,000 and 250,000, then "Signature Subhead 2" appears.

Etc.

Any advice for this script would be appreciated.

Thanks!