Zombie Horses | Minecraft | 1 Command

/summon falling_block ~ ~1 ~ {Block:"redstone_block",Time:3,Passengers:[{id:"falling_block",Block:"activator_rail",Time:3,Passengers:[{id:"commandblock_minecart",Command:/gamerule commandBlockOutput false},{id:"commandblock_minecart",Command:/scoreboard objectives add PackTimer dummy},{id:"commandblock_minecart",Command:/scoreboard objectives add EmSmiteHorse stat.killEntity.Horse},{id:"commandblock_minecart",Command:/fill ~2 ~-2 ~-1 ~5 ~6 ~1 concrete 13 hollow},{id:"commandblock_minecart",Command:/fill ~2 ~-1 ~-1 ~5 ~5 ~1 stained_glass 7 replace concrete},{id:"commandblock_minecart",Command:/summon falling_block ~3 ~-1 ~ {Block:repeating_command_block,Data:1,TileEntityData:{auto:1b,Command:/scoreboard players add SmiteHorse PackTimer 1},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:1,TileEntityData:{Command:/scoreboard players test SmiteHorse PackTimer 20},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:9,TileEntityData:{Command:/scoreboard players set SmiteHorse PackTimer 0},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:repeating_command_block,Data:9,TileEntityData:{auto:1b,Command:/scoreboard players tag @a remove EmSmiteHorse},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:1,TileEntityData:{Command:/scoreboard players tag @a[score_EmSmiteHorse_min=1] add EmSmiteHorse},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:1,TileEntityData:{Command:/scoreboard players set @a[score_EmSmiteHorse_min=1] EmSmiteHorse 0},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:5,TileEntityData:{Command:/scoreboard players tag @a[tag=EmSmiteHorse] add EmSpawnSmite},Time:1,DropItem:0}]}]}]}]}]}]}},{id:"commandblock_minecart",Command:/summon falling_block ~4 ~-1 ~ {Block:chain_command_block,Data:0,TileEntityData:{Command:scoreboard players tag @a[tag=EmSpawnSmite] remove EmSpawnSmite},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:0,TileEntityData:{Command:/execute @a[tag=EmSpawnSmite] ~ ~ ~ scoreboard players tag @e[tag=EmSmiteHorseE] remove EmSmiteHorseE},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:0,TileEntityData:{Command:/execute @a[tag=EmSpawnSmite] ~ ~ ~ /spreadplayers ~ ~ 1 50 0 @e[tag=EmSmiteHorseE]},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:0,TileEntityData:{Command:/execute @a[tag=EmSpawnSmite] ~ ~ ~ /summon zombie_horse ~ ~1 ~ {Tame:1,Attributes:[{Name:generic.maxHealth,Base:25}],Tags:["EmSmiteHorseE"]}},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:0,TileEntityData:{Command:/scoreboard players tag @a add EmHoldSmiteS {SelectedItem:{Count:1b,tag:{ench:[{lvl:5s,id:17s}]}}}},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:0,TileEntityData:{Command:/scoreboard players tag @a remove EmHoldSmiteS},Time:1,DropItem:0,Passengers:[{id:"falling_block",Block:chain_command_block,Data:0,TileEntityData:{Command:/scoreboard players tag @a[tag=!EmHoldSmiteS] remove EmSpawnSmite},Time:1,DropItem:0}]}]}]}]}]}]}},{id:"commandblock_minecart",Command:setblock ~1 ~1 ~ wall_sign 4 0 {Text1:"{\\\"text\\\":\\\"click here\\\",\\\"color\\\":\\\"dark_red\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/particle explode ~3 ~ ~ 1 3 1 .01 75 normal\\\"}}",Text2:"{\\\"text\\\":\\\"to remove\\\",\\\"color\\\":\\\"dark_red\\\"}",Text3:"{\\\"text\\\":\\\"this machine\\\",\\\"color\\\":\\\"dark_red\\\"}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~-3 ~-1 ~4 ~5 ~1 air\\\"}}"}},{id:"commandblock_minecart",Command:/setblock ~ ~1 ~ command_block 1 0 {auto:1b,Command:fill ~ ~ ~ ~ ~-2 ~ air}},{id:"commandblock_minecart",Command:kill @e[r=2,type=commandblock_minecart]}]}]}