On the Subject of Uncoloured Buttons

These buttons look different. Did they lose hue?

If this module's buttons have colour, you are looking at a different module.

This module presents a 4x4 grid of buttons, each coloured black or white. Each row of black and white buttons represents a four-digit binary number between 0 and 15 (where black = 0 and white = 1). Adding one to each of these numbers, they respectively point to a certain button (in reading order). Taking each of their colours in order, convert them into another four-digit binary number. Add one to this number and call it N. To solve the module, press the button that is the Nth button in reading order. Pressing the wrong button will cause a strike.