How many patterns can be formed with a single bit?

Two ― 0 and 1 (or "off" and "on", or "false" and "true")

A bit can be 0 or 1. With one bit there are two possible patterns. How many patterns can be formed with two bits? Here is a complete list:

0 0 0 1 1 0 1 1

Looks like 4 patterns.

Is the pattern `0 1`

different
from the pattern `1 0`

?