/summon FallingSand ~ ~10 ~ {Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/setblock ~ ~-6 ~1 redstone_block},Time:1,Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/setblock ~ ~-3 ~1 command_block 0 replace {Command:/fill ~ ~-1 ~ ~ ~-1 ~10 minecraft:redstone_block}},Time:1,Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/setblock ~ ~-3 ~1 command_block 0 replace {Command:/fill ~ ~1 ~ ~ ~1 ~10 stone}},Time:1}}}}}}