I Have Created A Sky Island Survival Map Using Command Blocks

Map Main Lobby
These Command Blocks Are Used To Set The Gamerules To Be A Certain Setting (Example:/gamerule KeepInventory False), In Addition The Command Blocks Are Used To Set Your Gamemode To Gamemode 0 (Survival) , Along With The Title Command /title @p title Sky Island, And /title @p subtitle By BarterChain65. The Last Thing That The Command Blocks Are Used For In This Section Is The Title Command To Count Down When You Press The Button Start The Game As Well It Will Do /title @p title WHOOSH And /playsound @p random.levelup(Sound) ~(X Coordinate) ~(Y Coordinate) ~(Z Coordinate) 100(Volume) After Teleporting.

Sky Island
The Command Blocks For The Sky Island The Command Block Is Activated By A Lever That Activates The Command Block With The /setblock, Command To Set A Redstone Block By Redstone Repeaters To Activate The Command Blocks Which Use The /fill Command, Finally Creating A Bridge To Their Respective Sky Islands (IE: Nether Portal Sky Island, End Portal Sky Island, And Village Trading Island).