Minecraft wiki entry for End_portal, associated text: In Creative mode, the player can construct an end portal by placing 12 end portal blocks in a ring enclosing an open 3×3 square and placing an eye of ender in each one. In order to activate, the end portal frames must be oriented correctly; the front face of each portal block must be pointed inward toward the 3×3 portal area. This can be achieved by the player standing in the center of the portal area and rotating to place the frames in a ring around them.