Flash briefly on the heating element / hob on a stove when it is adjusted

Problem

An ordinary stove has 4 burners/heating elements/hobs in a square pattern.
For adjusting these there are 4 knobs in a straight line.
Way too often the wrong knob is turned.

Solution

Have a light rapidly flash when a knob is turned, telling which hob was adjusted.

There can be downward pointing lights above each element; fastened in the kitchen hood.

There can be lights built into the stove top.