Fill separated input field by single input?

[iwishash]

Hi,
I'm trying to make multiple input field but could be written by single input action.
I mean, for example something like credit card input field?
If there are 4 separated fields (each field has space for 4 characters) and if I touch (on mobile device) any field, it will be filled from first field.
And if I enter the 12 digit code, all field should be filled by single input.
Just like attached pic.

Any advice would be appreciated.

[ArenMook]

Set them up as 4 individual fields. Add a limit of 4 characters to each. In a script listening to UIInput.onChange, detect when you've entered all 4 characters, and give focus to the next input field.