Clouds!

Got rid of the bulky old way I was going to generate clouds and created
a brand new one.

My new method of generating clouds is to have a 1 in 4 chance to spawn
a “cloud pixel” in the top 3 rows in the far right column. After the
screen updates to the left it will repeat and if there is already a
“cloud pixel” to the left it has a 1/2 chance of making a new cloud
pixel next to it.