Do you want to build a forest? Well, I'm here to give you the recipe in 8 simple steps. It will require a lot of ecological succession, or change over time. We'll start with a disaster. Perhaps a fiery tornado has torn through the land and nothing remains, or maybe you want a forest on a lava flow. The first step is to allow primary successors to colonize the land. These are the things that can live on seemingly nothing, think lichen. Then perennials will move in, annuals, small trees, and soon enough you'll have a forest!