wither pets, a minecraft concept in 1 command

/summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:fill ~ ~ ~1 ~ ~-27 ~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 ~ ~ ~-30 ~1 air}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~3 ~23.25 ~ {Block:command_block,Time:1,TileEntityData:{Command:fill ~ ~ ~-1 ~6 ~ ~1 nether_brick}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/tellraw @p ["",{"text":"thanks for trying this out ","color":"gray","bold":"true"},{"text":"command made by ","color":"blue","bold":"true"},{"text":" kingsalalander","color":"dark_aqua","bold":"true"}]},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/scoreboard objectives add Wc dummy},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/scoreboard objectives add Wp dummy},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~4 ~ ~-1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/scoreboard players set @e[type=WitherBoss,name=WitherPet] Wc 4},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[type=Endermite,name=WitherPet] ~ ~ ~ summon WitherBoss ~ ~ ~ {Invul:650,CustomName:WitherPet}},Time:1,}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~5 ~ ~-1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/entitydata @e[name=WitherPet] {Invul:650,CustomName:WitherPet}},Time:1,}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~6 ~ ~-1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/scoreboard players set @e[type=Item] Wc 2 {Item:{id:"minecraft:nether_star"}}},Time:1,}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~7 ~ ~-1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/scoreboard players set @e[type=Item] Wc 1 {Item:{id:"minecraft:skull"}}},Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~8 ~ ~-1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[score_Wc_min=1,score_Wc=1] ~ ~ ~ execute @e[score_Wc_min=2,score_Wc=2,r=1] ~ ~ ~ kill @e[score_Wc_min=1,score_Wc=2] },Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~9 ~ ~-1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[type=WitherBoss,name=WitherPet] ~ ~ ~ execute @e[score_Wc_min=3,score_Wc=3,r=1] ~ ~ ~ /summon FireworksRocketEntity ~ ~ ~ {LifeTime:0,FireworksItem:{id:401,Count:1,tag:{Fireworks:{Explosions:[{Type:0,Flicker:1,Trail:0,Colors:[16713728],FadeColors:[16741901]},{Type:0,Flicker:1,Trail:0,Colors:[16744965],FadeColors:[16252680]}]}}}}},Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~4 ~ ~1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/tp @e[type=Endermite,name=WitherPet] ~ ~-10000 ~},Time:1,}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~5 ~ ~1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[name=WitherPet] ~ ~ ~ effect @e[type=!Player,r=2] minecraft:wither 60 2 true},Time:1,}}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~6 ~ ~1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[name=WitherPet] ~ ~ ~ execute @p[rm=50] ~ ~ ~ tp @e[type=WitherBoss,name=WitherPet,rm=25] @p},Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~7 ~ ~1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[score_Wc_min=1,score_Wc=1] ~ ~ ~ execute @e[score_Wc_min=2,score_Wc=2,r=1] ~ ~ ~ summon Item ~ ~1 ~ {ench:[id:1,lvl:1],Item:{id:spawn_egg,Damage:67,Count:1,tag:{HideFlags:1,display:{Name:WitherPet}}}}},Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~8 ~ ~1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/scoreboard players set @e[type=Item] Wc 3 {Item:{id:"minecraft:fire_charge"}}},Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:summon FallingSand ~9 ~ ~1 {Block:nether_brick,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/execute @e[type=WitherBoss,name=WitherPet] ~ ~ ~ execute @e[score_Wc_min=3,score_Wc=3,r=1] ~ ~ ~ kill @e[score_Wc_min=3,score_Wc=4,r=2]},Time:1,}}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:gamerule commandBlockOutput false},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"fill ~3 ~-4 ~ ~9 ~-3 ~ redstone_block"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"setblock ~3 ~-3 ~-1 command_block 0 replace {Command:fill ~ ~ ~1 ~6 ~1 ~1 stone 0 replace redstone_block}"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"setblock ~3 ~-2 ~1 command_block 0 replace {Command:fill ~ ~ ~-1 ~6 ~1 ~-1 redstone_block 0 replace stone}"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:fill ~2 ~-1 ~-2 ~10 ~0 ~2 stained_glass 15 replace nether_brick},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:fill ~3 ~ ~-1 ~9 ~4 ~1 air 0 replace nether_brick},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:fill ~2 ~ ~-2 ~10 ~3 ~2 nether_brick},Time:1,Riding:{id:"FallingSand",Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}}}}}}}}}}