How to make a portal to the nether

This project needs:16 Obsidian and flint and steel. You first dig up 4 by 1 hole, and then place Obsidian in the hole. Next place 4 Obsidian up from the last at the end Obsidian blocks make the top and light the inside on fire, and then that is the portal just walk in it and stay in there and you will go to the Nether every step that you take in the Nether is +8, in the real world so you can make portals from one place to another.