Binary Counter

This is a representation of a 4 bit binary counter, in which each line represents a number.

With 4 bits (or 1 byte of 4 bits) you can count 16 decimal numbers ( 4 x 4 = 16) :

0 is 0000 1 is 0001 2 is 0010

So on so forth.

In binary the you have only 2 numbers, 0 and 1 - absence(0) or presence(1) of a established voltage level.

In the animation zero is white and one is black.

Up to now, binary code is the only one that the modern computers chips can communicate with themselves :

No matter the most complex operation a computer is executing, in the chip "universe" they are always "talking" in binary.