Composition is the way you arrange the visual elements in your piece. Kinda like organizing in a way.
They would move diagonally
The scientific answer to this question is eye and music lol
The artist is using the appeal of pathos (emotional response). They play on the viewers association of the sky with endlessness, as it is often described as such. Additionally, most people associate the sky with birds which are used as mascots which hold value for freedom, like America's bald eagle. Lastly, people have an involuntary reaction to positive stimulus by smiling.
Lin Manuel Miranda wrote Hamilton.
