How to add input number with GUI

Hello everyone

I have some lines, and each line has a specific number for color. I want to create a number or text input to get number interactively and then just show the line above that number with red color.

this is my PG:

in my code I have declared change lines color that their AU number is bigger than 5 but I want to create an input box that can get any number for AU and then change the lines color bigger than that input AU number. I would like to know how can I create an input box in GUI to get any number.

Yes you can:)

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Thank you so much.