This is from Sword Art Online TV show i use to watch it all the time good show. this comes with bedrock so you just need to lower it down when placeing. i use this for my worldspawn in my minecraft world but i remove command blocks. feel free to add the commands respawn at the top and a teleport to your loc that you want at the bottom. i put a lamp in middle when you get down there so you can see where to place command block. there is water so you dont die when you fall, also want to point out keep the top of this open for best light its really dark at night. so what i do in lots of my games is make a command block with daylight sensor for set time day. thats about all i hope you guys have fun i know i do i use this with my oculus rift and its really something thanks again everyone :)