Willex's doublejump no-mod for minecraft 1.9

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:"fill ~2 ~-3 ~-1 ~8 ~-1 ~2 stained_hardened_clay 15 hollow"},{id:MinecartCommandBlock,Command:"fill ~2 ~-2 ~-1 ~8 ~-2 ~2 stained_glass 0 replace stained_hardened_clay"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add Jump stat.jump"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add Verif dummy"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add Timer dummy"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add Pof dummy"},{id:MinecartCommandBlock,Command:"/tellraw @a [\"\",{\"text\":\"You have successfully installed Willex's double jump no-mod !\",\"color\":\"dark_aqua\",\"bold\":true}]"},{id:MinecartCommandBlock,Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text2:"{\\\"text\\\":\\\"Remove\\\",\\\"color\\\":\\\"dark_red\\\",\\\"italic\\\":true}",Text3:"{\\\"text\\\":\\\"No-Mod\\\",\\\"color\\\":\\\"dark_red\\\",\\\"italic\\\":true}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~-1 ~-1 ~7 ~1 ~2 air\\\"}}"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/scoreboard players set @a Verif 0"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/scoreboard players set @a[score_Verif=3] Pof 0"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/scoreboard players set @a[score_Pof=0] Jump 0"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~1 chain_command_block 4 replace {auto:1,Command:"/execute @a[score_Pof_min=1] ~ ~ ~ /scoreboard players set @e[type=Shulker,r=1] Timer 2"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~ chain_command_block 3 replace {auto:1,Command:"/scoreboard players remove @e[type=Shulker] Timer 1"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/kill @e[type=Shulker,name=DJ,score_Timer=1]"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/execute @a[score_Pof_min=1,score_Pof=10] ~ ~ ~  /summon Shulker ~ ~-1 ~ {CustomName:\\\"DJ\\\",AttachFace:0,NoAI:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:0,Duration:120,ShowParticles:0b}]}"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/execute @a[score_Jump=1,score_Jump_min=1,score_Verif_min=1] ~ ~ ~ detect ~ ~-1 ~ air 0 /scoreboard players add @p[r=1] Pof 1"}},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ repeating_command_block 5 replace {auto:1,Command:"/execute @a[score_Jump=1,score_Jump_min=1] ~ ~ ~ detect ~ ~-1 ~ air 0 /scoreboard players set @p[r=1] Verif 5"}},{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]}]}]}]}