Tnt grief prevention

/summon FallingSand ~ ~2 ~ {Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock ~-1 ~-2 ~ redstone_block},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:fill ~ ~2 ~ ~-1 ~-10 ~ air},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:fill ~-1 ~1 ~ ~-1 ~-6 ~ redstone_block},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:/scoreboard objectives add Tnt dummy},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:/gamerule mobGriefing false},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:"summon FallingSand ~4 ~-4 ~ {Block:command_block,Time:1,TileEntityData:{Command:/execute @e[score_Tnt_min=1] ~ ~ ~ summon Creeper ~ ~ ~ {Fuse:0,ignited:1,ActiveEffects:[{Id:14,Amplifier:1,Duration:100}],CustomName:Tnt}},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:fill ~-1 ~2 ~ ~-1 ~ ~ redstone_block}}}"},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:"setblock ~3 ~-4 ~ redstone_block"},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:"summon FallingSand ~2 ~-2 ~ {Block:command_block,Time:1,TileEntityData:{Command:/kill @e[score_Tnt_min=1]},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:/scoreboard players set @e[type=PrimedTnt] Tnt 1 {Fuse:1b}},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:fill ~1 ~2 ~ ~1 ~ ~ stone}}}}"},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:fill ~2 ~-3 ~ ~4 ~-3 ~ bedrock},Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:"gamerule commandBlockOutput false"}}}}}}}}}}}}}