I want my form to automatically move from one box to the next when completed

Hi, I am making a form which is a 14 digit number/letter combo. I have created an editbox for each individual number (i.e. 14 of them where only one digit can be entered into each) to help users ensure they do enter the right number and sequence but when completed, the user has to click in the next box themself to continue to the next box

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I want my form to automatically move from one box to the next when completed