Minecraft 1.9 Better Slimes in One Command

summon FallingSand ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:FallingSand,Block:redstone_block,Time:1,Passengers:[{id:FallingSand,Block:activator_rail,Time:1,Passengers:[{id:MinecartCommandBlock,Command:gamerule commandBlockOutput false},{id:MinecartCommandBlock,Command:" scoreboard objectives add SlimeAge dummy"},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~1 chain_command_block 5 replace {auto:1,Command:"effect @e[type=Slime,score_SlimeAge=2000] jump_boost 2 2 true"}},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ chain_command_block 3 replace {auto:1,Command:"effect @e[type=Slime,score_SlimeAge_min=20000] slowness 2 6 true"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~ chain_command_block 4 replace {auto:1,Command:"effect @e[type=Slime,score_SlimeAge_min=10000,score_SlimeAge=20000] slowness 2 4 true"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~ chain_command_block 4 replace {auto:1,Command:"effect @e[type=Slime,score_SlimeAge_min=5000,score_SlimeAge=10000] slowness 2 2 true"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~ chain_command_block 4 replace {auto:1,Command:"effect @e[type=Slime,score_SlimeAge=2000] speed 2 0 true"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~ chain_command_block 4 replace {auto:1,Command:"entitydata @e[type=Slime,score_SlimeAge_min=20000,score_SlimeAge=20000] {Size:4}"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~-1 chain_command_block 3 replace {auto:1,Command:"entitydata @e[type=Slime,score_SlimeAge_min=10000,score_SlimeAge=10000] {Size:3}"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~-1 chain_command_block 5 replace {auto:1,Command:"entitydata @e[type=Slime,score_SlimeAge_min=5000,score_SlimeAge=5000] {Size:2}"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~-1 chain_command_block 5 replace {auto:1,Command:"entitydata @e[type=Slime,score_SlimeAge_min=2000,score_SlimeAge=2000] {Size:1}"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~-1 chain_command_block 5 replace {auto:1,Command:"entitydata @e[type=Slime,score_SlimeAge=2] {Size:0}"}},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~-1 repeating_command_block 5 replace {auto:1,Command:"scoreboard players add @e[type=Slime] SlimeAge 1"}},{id:MinecartCommandBlock,Command:setblock ~ ~ ~1 command_block 0 replace {Command:fill ~ ~-3 ~-1 ~ ~ ~ air}},{id:MinecartCommandBlock,Command:setblock ~ ~-1 ~1 redstone_block},{id:MinecartCommandBlock,Command:kill @e[type=MinecartCommandBlock,r=1]}]}]}]}