Step 1: Oh look a wall, let’s build something in it





Step 2: Dig a hole in the wall the block deep, three blocks tall and five blocks wide.  Dig two blocks deeper and fill the base with netherrack,  Lastly, brick the inside of the hole.





Step 3: Set fire to the netherrack base, then place stone brick stairs in the bottom corner of where the hole meets the floor and one stone block directly between these.  In between the remaining gaps between the stair blocks place two stone brick slabs.





Step 4: Place a stair brick in each corner of the remaining hole.  Between the top two brick stairs place three brick slabs.  Do this between the bottom two stair blocks as well as covering the fire with brick slabs as well.  Hid a torch inside the oven to keep i lit up, without the torch it will look dark.





Step 5: Decorate it.