how to i setup a submit button from sheet 1 to remove the protection on sheet 2 so that a new user and input data then it will lock back up again

I have 2 sheets (Sheet 1 & Sheet 2), Sheet 1 has the sheet protected besides a few fillable cells including a apps script button to log the entered data to sheet 2. Sheet 2 is protected and can not be edit by another user. I am looking for some assistance to be able to add a script that will unlock sheet 2 when someone hits the submit button so that the data can be inputted then locks it back up so that one the owner can change the data after it has been inputted by another user.