This guide will let you know how to easily make the End Portal or Stronghold in Minecraft PE/PC. , follow the simple steps below
First, you have to suppose that you are standing in the center of the end portal and then place three blocks of the end portal in front of you, as shown in the image below.
After placing three blocks, you have to turn 90 degrees to the right and place three more end portals next to it.
You have to turn right to 90 degrees and place three blocks of the end portal right next to the second corner.
After that, you will need to place three blocks of the end portal at the bottom side, as shown in the image below.
Now you have to place the eye of ender on the top of every end portal.
After placing them all then the end portal will be activated.