/summon FallingSand ~ ~2 ~ {Block:redstone_block,Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~-1 ~-7 ~ ~-1 ~1 ~ minecraft:redstone_block},Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~-1 ~-6 ~ ~ ~2 ~ minecraft:air},Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command: /summon FallingSand ~-1 ~-3 ~10 {Block:redstone_block,Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~-1 ~-9 ~ ~-1 ~1 ~ minecraft:redstone_block},Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~-1 ~-8 ~ ~ ~2 ~ minecraft:air},Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command: /summon FallingSand ~ ~1 ~-1 {Block:redstone_block,Time:1,DropItem:0,Riding: {id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~ ~-6 ~1 ~ ~1 ~1 minecraft:redstone_block},Time:1,DropI...