Rideable Mobs in One command

/summon FallingSand ~ ~2 ~ {Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{Riding:{TileEntityData:{Command:"/fill ~2 ~-1 ~2 ~-2 ~3 ~14 minecraft:stained_glass 0 hollow",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~2 ~-2 ~2 ~-2 ~-2 ~14 minecraft:stained_hardened_clay 3",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~1 ~-2 ~3 ~-1 ~2 ~13 air",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~1 ~-3 ~12 ~-1 ~-1 ~12 redstone_block",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"summon FallingSand ~-1 ~3 ~11 {Riding:{Riding:{TileEntityData:{Command:\"/gamerule commandBlockOutput false\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/gamerule logAdminCommands false\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},id:\"FallingSand\",Block:\"iron_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"summon FallingSand ~-1 ~2 ~13 {Riding:{Riding:{TileEntityData:{Command:\"/tellraw @p [\\\"\\\",{\\\"text\\\":\\\"Thanks for installing \\\"},{\\\"text\\\":\\\"Rideable mobs\\\",\\\"color\\\":\\\"green\\\",\\\"bold\\\":\\\"true\\\"},{\\\"text\\\":\\\"!\\\",\\\"color\\\":\\\"none\\\",\\\"bold\\\":\\\"false\\\"}]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @a ~ ~ ~ /summon FireworksRocketEntity ~ ~ ~ {LifeTime:15,FireworksItem:{id:401,Count:1,tag:{Fireworks:{Explosions:[{Type:0,Flicker:0,Trail:0,Colors:[35071],FadeColors:[5423103]},{Type:4,Flicker:1,Trail:0,Colors:[48127],FadeColors:[2509567]},{Type:2,Flicker:0,Trail:0,Colors:[8049663],FadeColors:[2856447]},{Type:1,Flicker:0,Trail:0,Colors:[1245183],FadeColors:[50175,26367]}]}}}}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},id:\"FallingSand\",Block:\"iron_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"summon FallingSand ~0 ~1 ~11 {Riding:{Riding:{TileEntityData:{Command:\"fill ~-2 ~3 ~3 ~2 ~3 ~-9 minecraft:stained_hardened_clay 3\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"summon FallingSand ~0 ~1 ~-8 {id:\\\"FallingSand\\\",Block:\\\"redstone_block\\\",Time:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},id:\"FallingSand\",Block:\"iron_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~-1 ~2 ~3 {Riding:{Riding:{TileEntityData:{Command:\"/fill ~1 ~ ~ ~1 ~2 ~7 stone\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableCow] ~ ~ ~ summon Cow ~ ~ ~ {CustomName:RideableCow,CustomNameVisible:0}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableCow] ~ ~ ~ summon EntityHorse ~ ~ ~ {Silent:1,Variant:7,Tame:1,Saddle:1,CustomName:Cow,CustomNameVisible:0,Invulnerable:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~1 ~1 ~3 {Riding:{Riding:{TileEntityData:{Command:\"/fill ~-1 ~ ~ ~-1 ~2 ~7 redstone_block\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/effect @e[type=Cow,name=RideableCow] jump_boost 1 255 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Cow] ~ ~ ~ tp @e[type=Cow,name=RideableCow,r=0] @e[type=EntityHorse,name=Cow,r=1]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~-1 ~0 ~4 {Riding:{Riding:{TileEntityData:{Command:\"/effect @e[type=MushroomCow,name=RideableMooshroom] jump_boost 1 255 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=MushroomCow] ~ ~ ~ tp @e[type=MushroomCow,name=RideableMooshroom,r=0] @e[type=EntityHorse,name=Mooshroom,r=1]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableMooshroom] ~ ~ ~ summon MushroomCow ~ ~ ~ {CustomName:RideableMooshroom,CustomNameVisible:0}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~1 ~-1 ~4 {Riding:{Riding:{TileEntityData:{Command:\"/kill @e[type=Bat,name=RideableCow]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/effect @e[type=Sheep,name=RideableSheep] jump_boost 1 255 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Sheep] ~ ~ ~ tp @e[type=Sheep,name=RideableSheep,r=0] @e[type=EntityHorse,name=Sheep,r=1]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~-1 ~-2 ~5 {Riding:{Riding:{TileEntityData:{Command:\"/effect @e[type=Slime,name=RideableSlime] jump_boost 1 255 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Slime] ~ ~ ~ tp @e[type=Slime,name=RideableSlime,r=0] @e[type=EntityHorse,name=Slime,r=1]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/kill @e[type=Bat,name=RideableMooshroom]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~1 ~-3 ~5 {Riding:{Riding:{TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableMooshroom] ~ ~ ~ summon EntityHorse ~ ~ ~ {Silent:1,Variant:7,Tame:1,Saddle:1,CustomName:Mooshroom,CustomNameVisible:0,Invulnerable:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/effect @e[type=EntityHorse,name=Cow] slowness 1 4 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/effect @e[type=EntityHorse,name=Mooshroom] slowness 1 3 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~-1 ~-4 ~6 {Riding:{Riding:{TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableSheep] ~ ~ ~ summon Sheep ~ ~ ~ {CustomName:RideableSheep,CustomNameVisible:0}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableSheep] ~ ~ ~ summon EntityHorse ~ ~ ~ {Silent:1,Variant:7,Tame:1,Saddle:1,CustomName:Sheep,CustomNameVisible:0,Invulnerable:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/kill @e[type=Bat,name=RideableSheep]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~1 ~-5 ~6 {Riding:{Riding:{TileEntityData:{Command:\"/effect @e[type=EntityHorse,name=Sheep] slowness 1 4 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/effect @e[type=EntityHorse,name=Slime] slowness 1 4 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Slime,name=RideableSlime] ~ ~ ~ effect @a[r=3] resistance 1 255 true\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/summon FallingSand ~-1 ~-6 ~7 {Riding:{Riding:{TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableSlime] ~ ~ ~ summon Slime ~ ~ ~ {CustomName:RideableSlime,CustomNameVisible:0,Size:1,NoAI:1,Invulnerable:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/execute @e[type=Bat,name=RideableSlime] ~ ~ ~ summon EntityHorse ~ ~ ~ {Silent:1,Variant:7,Tame:1,Saddle:1,CustomName:Slime,CustomNameVisible:0,Invulnerable:1}\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1},TileEntityData:{Command:\"/kill @e[type=Bat,name=RideableSlime]\",id:\"Control\"},id:\"FallingSand\",Block:\"command_block\",Time:1}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/setblock ~ ~-15 ~1 wall_sign 2 0 {Text2:\"{\\\"bold\\\":true,\\\"color\\\":\\\"dark_aqua\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"give @p spawn_egg 1 65 {display:{Name:\\\\\\\"RideableCow\\\\\\\"}}\\\"},\\\"text\\\":\\\"Get Items\\\"}\",Text3:\"{\\\"color\\\":\\\"black\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"give @p spawn_egg 1 65 {display:{Name:\\\\\\\"RideableSlime\\\\\\\"}}\\\"},\\\"text\\\":\\\"           \\\"}\",Text1:\"{\\\"color\\\":\\\"blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"give @p spawn_egg 1 65 {display:{Name:\\\\\\\"RideableSheep\\\\\\\"}}\\\"},\\\"text\\\":\\\"--------------\\\"}\",Text4:\"{\\\"color\\\":\\\"blue\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"give @p spawn_egg 1 65 {display:{Name:\\\\\\\"RideableMooshroom\\\\\\\"}}\\\"},\\\"text\\\":\\\"--------------\\\"}\",y:56,x:-905,z:990,id:\"Sign\"}",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~ ~-17 ~ ~-1 ~2 ~ air",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},TileEntityData:{Command:"/fill ~-1 ~-18 ~ ~-1 ~-1 ~ redstone_block",id:"Control"},id:"FallingSand",Block:"command_block",Time:1},id:"FallingSand",Block:"redstone_block",Time:1}