Go to creative, start the game with 1 or 2 players, walk 4000-5000 paces then you get to rock and lava and there will be gold, diamonds, and there will be holes in the ground where There will be bloodstone in there. Make sure you have a diamond pick axe or bloodstone pick Then save the game. Whoever is host saves map. Make sure you have 1 or 2 safehouses in map. Make sure you have at least 2 crates to put the stuff you have in but keep the things you want to spawn with in your inventory. After you save the game you can go to endurance or survival or creative and edit the map.