First you'll need to be on creative because i have not tested on survival. You'll need:eye of ender and a end portal frame. First make a portal shape which is 5 by 5 then smash up one place the eye in each one then step in the portal and place the last frame now start flying make sure you don't go out of the frame then place the eye of ender in you now have a end portal you can smash the frame but it wont go.