Explosive Snowballs [One Command]

/summon FallingSand ~ ~2 ~ {Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~-1 ~-6 ~ ~-1 ~ ~ redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/summon FallingSand ~1 ~ ~4 {Block:command_block,TileEntityData:{Command:/execute @e[type=Snowball] ~ ~ ~ /summon WitherSkull ~ ~ ~ {direction:[]}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[type=Snowball] ~ ~ ~ /kill @e[type=WitherSkull,r=3]},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard players add @e[type=WitherSkull] WS 1},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~ ~3 ~1 ~ ~ ~1 air},Time:1}}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/summon FallingSand ~1 ~ ~6 {Block:command_block,TileEntityData:{Command:/execute @e[score_WS_min=1] ~ ~ ~ /summon PrimedTnt ~ ~ ~},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard players add @e[type=WitherSkull] WS 1},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/kill @e[score_WS_min=2]},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/fill ~ ~3 ~-1 ~ ~ ~-1 redstone_block},Time:1}}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard objectives add WS dummy},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/summon FallingSand ~1 ~13 ~2 {Block:redstone_block,Time:1}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/summon FallingSand ~1 ~13 ~5 {Block:redstone_block,Time:1}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/give @a snowball 1 0 {display:{Name:"Exploding Snowball"},HideFlags:127,ench:[{id:32,lvl:}]}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/tellraw @p ["",{"text":"Explosive Snowballs","color":"dark_red","bold":"true","italic":"true"},{"text":" is ready!","color":"black","bold":"false","italic":"false"},{"text":" [","color":"gold"},{"text":"Made by ReiminkD","color":"dark_purple","bold":"true","italic":"true"},{"text":"]","color":"gold","bold":"false","italic":"false"}]},Time:1}}}}}}}}