Couple of things you should read on the subject of existence and nothingness.
1) Plato - the Platonic discourses on perfection and the existence of everything as it relates to a perfect ideal. Specifically the Allegory of the Cave.
Allegory of the cave - Wikipedia, the free encyclopedia
2) The theories of Erwin Schrödinger and his cat
Schrödinger's cat - Wikipedia, the free encyclopedia
3) ANY existential writing such as
Satre or even
Waiting for Godot.
Fascinating subject that's been explored in literature and art since man first started using more of his brain.