This is a study about Negative Space. Look at the movement of the space between the star shapes. Do you only see the stars? Can you see the organic frame surrounding the stars? With Space bar you can switch to different background colors. Do any particular background color work better for you in this experiment? You may need to relax your eyes and look at an oval at the center of the screen from a distance focusing on the colored background.
SBissay's great project Arcs and Polygons got me thinking about negative spaces. https://scratch.mit.edu/projects/182904936/