Minecart Birthday Cakes with Only One Command

summon falling_block ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:falling_block,Block:redstone_block,Time:1,Passengers:[{id:falling_block,Block:activator_rail,Time:1,Passengers:[{id:commandblock_minecart,Command:gamerule commandBlockOutput false},{id:commandblock_minecart,Command:fill ~1 ~-3 ~4 ~-1 ~1 ~10 stained_hardened_clay 3 hollow},{id:commandblock_minecart,Command:fill ~1 ~-2 ~4 ~-1 ~ ~10 stained_glass 0 0 stained_hardened_clay},{id:commandblock_minecart,Command:/scoreboard objectives add Hori dummy},{id:commandblock_minecart,Command:/setblock ~1 ~-3 ~2 oak_stairs 4},{id:commandblock_minecart,Command:/setblock ~ ~-3 ~2 wooden_slab 8},{id:commandblock_minecart,Command:/setblock ~ ~-2 ~2 cake},{id:commandblock_minecart,Command:/setblock ~-1 ~-3 ~2 oak_stairs 5},{id:commandblock_minecart,Command:/summon armor_stand ~ ~-3.65 ~2.275 {CustomName:Hori,Invisible:1,NoGravity:1,Invulnerable:1,ArmorItems:[{},{},{},{id:torch,Count:1}]}},{id:commandblock_minecart,Command:/summon armor_stand ~-0.275 ~-3.65 ~2 {CustomName:Diag,Invisible:1,NoGravity:1,Invulnerable:1,ArmorItems:[{},{},{},{id:torch,Count:1}],Pose:{Head:[0f,90f,0f]}}},{id:commandblock_minecart,Command:/summon armor_stand ~ ~-2 ~2 {CustomName:TestBDC,Invisible:1,NoGravity:1,Invulnerable:1}},{id:commandblock_minecart,Command:setblock ~ ~-2 ~3 wall_sign 2 0 {Text1:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/give @p spawn_egg 1 65 {display:{Name:\\\\\\\"BDCake\\\\\\\"},EntityTag:{id:\\\\\\\"minecraft:bat\\\\\\\"}}\\\"}}",Text2:"{\\\"text\\\":\\\"Get\\\"}",Text3:"{\\\"text\\\":\\\"Birthday Cakes\\\",\\\"color\\\":\\\"dark_blue\\\"}",Text4:"{\\\"text\\\":\\\"\\\"}"}},{id:commandblock_minecart,Command:setblock ~ ~-1 ~3 wall_sign 2 0 {Text1:"{\\\"text\\\":\\\"\\\"}",Text2:"{\\\"text\\\":\\\"Birthday Cakes\\\",\\\"color\\\":\\\"dark_blue\\\",\\\"italic\\\":true}",Text3:"{\\\"text\\\":\\\"by TCSimon\\\",\\\"color\\\":\\\"dark_red\\\"}",Text4:"{\\\"text\\\":\\\"\\\"}"}},{id:commandblock_minecart,Command:setblock ~ ~ ~3 wall_sign 2 0 {Text1:"{\\\"text\\\":\\\"===========\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/kill @e[type=armor_stand,name=Hori]\\\"}}",Text2:"{\\\"text\\\":\\\"Click to DESTROY\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/kill @e[type=armor_stand,name=Diag]\\\"}}",Text3:"{\\\"text\\\":\\\"this MACHINE\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/kill @e[type=armor_stand,name=TestBDC]\\\"}}",Text4:"{\\\"text\\\":\\\"===========\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~-2 ~-3 ~ ~1 ~1 ~7 air\\\"}}"}},{id:commandblock_minecart,Command:fill ~ ~-2 ~5 ~ ~ ~9 chain_command_block 3},{id:commandblock_minecart,Command:setblock ~ ~-1 ~5 chain_command_block 1},{id:commandblock_minecart,Command:fill ~ ~-1 ~9 ~ ~-1 ~6 chain_command_block 2},{id:commandblock_minecart,Command:setblock ~ ~-2 ~9 chain_command_block 1},{id:commandblock_minecart,Command:setblock ~ ~-2 ~5 repeating_command_block 3},{id:commandblock_minecart,Command:blockdata ~ ~ ~8 {auto:1,Command:/execute @e[type=armor_stand,name=TestBDC] ~ ~ ~ detect ~ ~ ~ cake 4 /kill @e[type=armor_stand,name=TestBDC]}},{id:commandblock_minecart,Command:blockdata ~ ~ ~7 {auto:1,Command:/execute @e[type=armor_stand,name=TestBDC] ~ ~ ~ detect ~ ~ ~ cake 4 /summon Item ~ ~1 ~ {Item:{id:torch,Count:1}}}},{id:commandblock_minecart,Command:blockdata ~ ~ ~6 {auto:1,Command:/execute @e[type=armor_stand,name=TestBDC] ~ ~ ~ detect ~ ~ ~ cake 4 /kill @e[type=armor_stand,name=Diag,r=2]}},{id:commandblock_minecart,Command:blockdata ~ ~ ~5 {auto:1,Command:/execute @e[type=armor_stand,name=TestBDC] ~ ~ ~ detect ~ ~ ~ cake 4 /kill @e[type=armor_stand,name=Hori,r=2]}},{id:commandblock_minecart,Command:blockdata ~ ~-1 ~5 {auto:1,Command:/execute @e[type=Bat,name=BDCake] ~ ~ ~ kill @e[type=Bat,name=BDCake]}},{id:commandblock_minecart,Command:blockdata ~ ~-1 ~6 {auto:1,Command:/execute @e[type=Bat,name=BDCake] ~ ~ ~ /summon armor_stand ~ ~ ~ {CustomName:Test,Invisible:1,NoGravity:1,Invulnerable:1}}},{id:commandblock_minecart,Command:blockdata ~ ~-1 ~7 {auto:1,Command:/execute @e[type=Bat,name=BDCake] ~ ~ ~ /summon armor_stand ~-0.275 ~-1.6 ~ {CustomName:Diag,Invisible:1,NoGravity:1,Invulnerable:1,ArmorItems:[{},{},{},{id:torch,Count:1}],Pose:{Head:[0f,90f,0f]}}}},{id:commandblock_minecart,Command:blockdata ~ ~-1 ~8 {auto:1,Command:/execute @e[type=Bat,name=BDCake] ~ ~ ~ /summon armor_stand ~ ~-1.6 ~0.275 {CustomName:Hori,Invisible:1,NoGravity:1,Invulnerable:1,ArmorItems:[{},{},{},{id:torch,Count:1}]}}},{id:commandblock_minecart,Command:blockdata ~ ~-1 ~9 {auto:1,Command:/execute @e[type=Bat,name=BDCake] ~ ~ ~ setblock ~ ~ ~ cake}},{id:commandblock_minecart,Command:blockdata ~ ~-2 ~9 {auto:1,Command:/execute @e[type=Bat,name=BDCake] ~ ~ ~ entitydata @e[type=Bat,name=BDCake] {NoAI:1}}},{id:commandblock_minecart,Command:blockdata ~ ~-2 ~8 {auto:1,Command:/scoreboard players set @e[name=Hori,score_Hori_min=20] Hori 0}},{id:commandblock_minecart,Command:blockdata ~ ~-2 ~7 {auto:1,Command:/execute @e[type=armor_stand,name=Hori,score_Hori_min=20] ~ ~ ~ particle smoke ~ ~2.4 ~-0.26 0 0 0 0 2}},{id:commandblock_minecart,Command:blockdata ~ ~-2 ~6 {auto:1,Command:/execute @e[type=armor_stand,name=Hori,score_Hori_min=18] ~ ~ ~ particle flame ~ ~2.35 ~-0.26 0 0 0 0 1}},{id:commandblock_minecart,Command:blockdata ~ ~-2 ~5 {auto:1,Command:/scoreboard players add @e[name=Hori] Hori 1}},{id:commandblock_minecart,Command:setblock ~ ~ ~1 command_block 0 0 {Command:fill ~ ~-3 ~-1 ~ ~ ~ air}},{id:commandblock_minecart,Command:setblock ~ ~-1 ~1 redstone_block},{id:commandblock_minecart,Command:kill @e[type=commandblock_minecart,r=1]}]}]}]}