Post some pictures maybe? and if you cant, is like this:
In a 3x3x3, make the 4 corners pillars of netherbrick 3 blocks high, fill the floor layer with obsidian, above one of the obsidian/between 2 of the pillars place an iron bar, in the middle of the 3x3 place lava and around it obsidian, on the third level put obsidian between the pilars but no in the middle, then use the wand.