The Halloween Challenge - MegaManMinecraft

/summon MinecartCommandBlock ~ ~1 ~ {Command:kill @e[type=MinecartCommandBlock,r=1],Riding:{id:MinecartCommandBlock,Command:setblock ~ ~-1 ~1 redstone_block,Riding:{id:MinecartCommandBlock,Command:setblock ~ ~ ~1 command_block 0 replace {Command:fill ~ ~-3 ~-1 ~ ~ ~ air},Riding:{id:MinecartCommandBlock,Command:"/difficulty 3",Riding:{id:MinecartCommandBlock,Command:"/gamerule doDaylightCycle false",Riding:{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ redstone_block,Riding:{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~-1 command_block 0 replace {Command:fill ~ ~ ~1 ~2 ~ ~1 stone},Riding:{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~1 command_block 0 replace {Command:fill ~ ~ ~-1 ~2 ~ ~-1 redstone_block},Riding:{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~-1 command_block 0 replace {Command:"/entitydata @e[type=Creeper] {powered:1,ExplosionRadius:16}"},Riding:{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~1 command_block 0 replace {Command:"/entitydata @e[type=Skeleton] {SkeletonType:1,Equipment:[{id:diamond_sword},{},{},{},{id:lit_pumpkin}]}"},Riding:{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~-1 command_block 0 replace {Command:"/entitydata @e[type=Zombie] {Equipment:[{id:iron_sword},{},{},{id:diamond_chestplate},{id:minecraft:pumpkin}],IsBaby:1}"},Riding:{id:MinecartCommandBlock,Command:setblock ~1 ~-1 ~ wall_sign 4 replace {Text1:"{text:\\\"Start Challenge!\\\",color:black,clickEvent:{action:\\\"run_command\\\",value:\\\"/time set 16000\\\"},bold:true,underlined:true}",Text2:"{text:\\\"\\\",clickEvent:{action:\\\"run_command\\\",value:\\\"/effect @p minecraft:nausea 10 5 true\\\"}}",Text3:"{text:\\\"\\\",clickEvent:{action:\\\"run_command\\\",value:\\\"/effect @p minecraft:blindness 10 5 true\\\"}}",Text4:"{text:\\\"\\\",clickEvent:{action:\\\"run_command\\\",value:\\\"/playsound mob.wither.death @p ~ ~ ~ 1000\\\"}}"},Riding:{id:MinecartCommandBlock,Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:\\\"DESTROY MACHINE\\\",color:red,bold:true,underlined:true}",Text4:"{text:\\\"\\\",clickEvent:{action:\\\"run_command\\\",value:\\\"fill ~ ~-1 ~-2 ~6 ~2 ~2 air\\\"}}"},Riding:{id:MinecartCommandBlock,Command:fill ~2 ~-2 ~-2 ~6 ~-2 ~2 stained_glass 3 replace stained_hardened_clay 3,Riding:{id:MinecartCommandBlock,Command:fill ~2 ~-3 ~-2 ~6 ~-1 ~2 stained_hardened_clay 3 hollow,Riding:{id:MinecartCommandBlock,Command:gamerule commandBlockOutput false,Riding:{id:MinecartCommandBlock,Riding:{id:FallingSand,Block:activator_rail,Time:1,Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}