This is my concept sketch of something I've been thinking a lot about. This would be a cross-section of multiple universes, all created by their own big bangs. I think this would follow something called the cyclic model, where the universe is created in a big bang, then squeezes back together at points only to explode once again into a new universe over and over again forever. All of the bright dusty strands in this picture would represent clusters of galaxies and star clusters, so it is on an immense scale. All of the matter and galaxies eventually crunch back together in those brighter sections, due to gravity, and create many black holes, which also suck each other up to eventually create bigger and bigger black holes, till they eventually get too big and explode into another universe, which would be a big bang.