Minecraft - Heat Death in a Command Block

/summon FallingSand ~ ~1 ~2 {DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/fill ~ ~1 ~ ~ ~-18 ~-2 air 0 replace},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/gamerule logAdminCommands false},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/summon FallingSand ~2 ~-13 ~-2 {Time:1,Block:"minecraft:command_block",DropItem:0,TileEntityData:{Command:/execute @a ~ ~ ~ /summon MinecartSpawner ~ 255 ~ {Delay:0,MaxNearbyEntities:999,MaxSpawnDelay:9999,MinSpawnDelay:9999,RequiredPlayerRange:999,SpawnCount:1,SpawnRange:100,EntityId:FallingSand,SpawnData:{Motion:[0.0,-500.0,0.0],Block:"minecraft:lava",Data:7b,Time:1,DropItem:0,HurtEntities:0}}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/gamerule commandBlockOutput false},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/gamerule doDaylightCycle false}}}}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~3 ~-10 ~-1 minecraft:command_block 0 replace {Command:/execute @a ~ ~ ~ /summon MinecartSpawner ~ 255 ~ {Delay:0,MaxNearbyEntities:999,MaxSpawnDelay:9999,MinSpawnDelay:9999,RequiredPlayerRange:999,SpawnCount:1,SpawnRange:100,EntityId:SmallFireball,SpawnData:{direction:[0.0,-100.0,0]}}}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~1 ~-8 ~-1 minecraft:command_block 0 replace {Command:/scoreboard players add @e[type=MinecartSpawner] Age 1}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~3 ~-7 ~-1 minecraft:command_block 0 replace {Command:/scoreboard objectives add Age dummy}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~1 ~-5 ~-1 minecraft:command_block 0 replace {Command:/kill @e[type=MinecartSpawner,score_Age_min=2]}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~2 ~-4 ~-1 redstone_block},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~3 ~-2 ~-1 minecraft:command_block 0 replace {Command:/fill ~-1 ~ ~ ~-1 ~2 ~ redstone_block}},Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:redstone_block",Riding:{id:"FallingSand",DropItem:0,HurtEntities:0,Time:1b,Block:"minecraft:command_block",TileEntityData:{Command:/setblock ~1 ~ ~-1 minecraft:command_block 0 replace {Command:/fill ~1 ~ ~ ~1 ~2 ~ air}}}}}}}}}}}}}}}}}}}}}}