Minecraft Death count (Minecraft 1.8)

/summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/fill ~ ~0 ~1 ~ ~-7 ~1 redstone_block"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~ ~3 ~1 stone},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:setblock ~ ~4 ~ command_block 0 replace {Command:fill ~ ~2 ~ ~ ~-11 ~1 air}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/scoreboard players set @a Deaths 0"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/scoreboard objectives setdisplay sidebar Deaths"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/scoreboard objectives add Deaths deathCount"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/say enabled Death count"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/gamerule commandBlockOutput false"},Time:1,Riding:{id:"FallingSand",Block:stone,Time:1}}}}}}}}}}