Minecraft 15w42a+ | Dimension Changes

summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Passengers:[ {id:FallingSand,Block:activator_rail,Time:1}, {id:MinecartCommandBlock,Command:"gamerule commandBlockOutput 0"}, {id:MinecartCommandBlock,Command:"scoreboard objectives add Dimension dummy"}, {id:MinecartCommandBlock,Command:"setblock ~2 ~-2 ~-2 minecraft:repeating_command_block 3 replace {auto:1b,Command:testfor @a}"}, {id:MinecartCommandBlock,Command:"setblock ~2 ~-2 ~-1 minecraft:chain_command_block 3 replace {auto:1b,Command:scoreboard players set @a Dimension -1 {Dimension:-1}}"}, {id:MinecartCommandBlock,Command:"setblock ~2 ~-2 ~ minecraft:chain_command_block 3 replace {auto:1b,Command:scoreboard players set @a Dimension 0 {Dimension:0}}"}, {id:MinecartCommandBlock,Command:"setblock ~2 ~-2 ~1 minecraft:chain_command_block 3 replace {auto:1b,Command:scoreboard players set @a Dimension 1 {Dimension:1}}"}, {id:MinecartCommandBlock,Command:"setblock ~2 ~-2 ~2 minecraft:chain_command_block 5 replace {auto:1b,Command:execute @a[score_Dimension=-1] ~ ~ ~ fill ~16 122 ~16 ~-16 127 ~-16 minecraft:netherrack 0 replace minecraft:bedrock}"}, {id:MinecartCommandBlock,Command:"setblock ~3 ~-2 ~2 minecraft:chain_command_block 2 replace {auto:1b,Command:execute @a[score_Dimension_min=1] ~ ~ ~ fill ~16 16 ~16 ~-16 -16 ~-16 minecraft:air 0 replace minecraft:lava}"}, {id:MinecartCommandBlock,Command:"setblock ~3 ~-2 ~1 minecraft:chain_command_block 2 replace {auto:1b,Command:execute @a[score_Dimension_min=1] ~ ~ ~ fill ~16 16 ~16 ~-16 -16 ~-16 minecraft:air 0 replace minecraft:flowing_lava}"}, {id:MinecartCommandBlock,Command:"setblock ~3 ~-2 ~ minecraft:chain_command_block 2 replace {auto:1b,Command:execute @a[score_Dimension_min=1] ~ ~ ~ fill ~16 0 ~16 ~-16 0 ~-16 minecraft:bedrock 0 replace minecraft:air}"}, {id:MinecartCommandBlock,Command:"setblock ~3 ~-2 ~-1 minecraft:chain_command_block 2 replace {auto:1b,Command:execute @a[score_Dimension_min=0,score_Dimension=0] ~ ~ ~ fill ~16 9 ~16 ~-16 0 ~-16 minecraft:barrier 0 replace minecraft:bedrock}"}, {id:MinecartCommandBlock,Command:"tellraw @a [\"\",{\"text\":\"\n\nDimension Changes\",\"color\":\"green\",\"bold\":true,\"underlined\":true},{\"text\":\" has been installed!\",\"color\":\"gold\",\"bold\":true,\"underlined\":false},{\"text\":\"\n\nDimension Changes was made by AThingWithAThing\",\"color\":\"red\",\"underlined\":true,\"bold\":false},{\"text\":\"\n\nMCF Forum\n\n\",\"color\":\"aqua\",\"underlined\":true,\"clickEvent\":{\"action\":\"open_url\",\"value\":\"http://www.minecraftforum.net/members/AThingWithAThing\"}}]"}, {id:MinecartCommandBlock,Command:"setblock ~1 ~-1 ~ command_block 0 replace {Command:\"fill ~ ~-1 ~ ~-1 ~1 ~ air\",auto:1b}"}, {id:MinecartCommandBlock,Command:"kill @e[type=MinecartCommandBlock,r=1]"}]}