Adafruit_SSD1306.h: No such file or directory

You should never post in the Uncategorised section.
It says so in the description of the section. Therefore I have moved your post here.

You might want to look at this How to get the best out of this forum before you proceed any further.
We only know what you tell us, and without knowing what you have, we don't stand a chance.

Also posting images of code is absolutely useless please don't do it.