What was there before the dinosaurs?

Before the time of the Dinosaurs there was the Permian which included the first instance of reptilian diversification.And before that was the Carboniferous which was the Age of amphibians. And before that it was the Devonian and Silurian which was the age of fish. And before that it was the Ordovician and was the Age of Invertebrate. Before that was the Cambrian which was when Multi-cellular organism started to evolve. And lastly the Pr-Cambrian was where Single organism start to flourish, and lastly again before even that was when the Earth was created.