Kill Streaks (Minecraft 1.12.2 (Bukkit))

summon falling_block ~ ~2 ~ {Time:1,Block:stone,Passengers:[{id:falling_block,Time:1,Block:redstone_block,Passengers:[{id:falling_block,Time:1,Block:activator_rail,Passengers:[{id:commandblock_minecart,Command:"gamerule sendCommandFeedback false"},{id:commandblock_minecart,Command:"gamerule commandBlockOutput false"},{id:commandblock_minecart,Command:"scoreboard objectives add death deathCount"},{id:commandblock_minecart,Command:"scoreboard objectives add killstreak playerKillCount"},{id:commandblock_minecart,Command:"fill ~2 ~-2 ~-1 ~12 ~-2 ~2 stained_hardened_clay 11"},{id:commandblock_minecart,Command:"fill ~2 ~-1 ~-1 ~12 ~-1 ~2 stained_glass 11"},{id:commandblock_minecart,Command:"fill ~3 ~-1 ~ ~11 ~-1 ~1 air"},{id:commandblock_minecart,Command:"fill ~2 ~ ~-1 ~12 ~ ~2 stained_hardened_clay 11"},{id:commandblock_minecart,Command:"setblock ~11 ~-1 ~ repeating_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_killstreak_min=5] add 5\"}"},{id:commandblock_minecart,Command:"setblock ~10 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"execute @a[tag=5,score_death_min=1] ~ ~ ~ tellraw @a [\\\"\\\",{\\\"selector\\\":\\\"@s\\\",\\\"color\\\":\\\"red\\\"},{\\\"text\\\":\\\"\\\\u00a77's kill streak was shut down!\\\"}]\"}"},{id:commandblock_minecart,Command:"setblock ~9 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a remove 5\"}"},{id:commandblock_minecart,Command:"setblock ~8 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_death_min=1] remove 5killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~7 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_death_min=1] remove 10killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~6 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_death_min=1] remove 15killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~5 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_death_min=1] remove 30killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~4 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players set @a[score_death_min=1] killstreak 0\"}"},{id:commandblock_minecart,Command:"setblock ~3 ~-1 ~ chain_command_block 4 replace {auto:1b,Command:\"scoreboard players set @a death 0\"}"},{id:commandblock_minecart,Command:"setblock ~11 ~-1 ~1 repeating_command_block 4 replace {auto:1b,Command:\"execute @a[tag=!5killstreak,score_killstreak_min=5] ~ ~ ~ tellraw @a [\\\"\\\",{\\\"selector\\\":\\\"@p\\\",\\\"color\\\":\\\"red\\\"},{\\\"text\\\":\\\"\\\\u00a77 is on a kill streak of \\\\u00a7a\\\\u00a7l5\\\\u00a77!\\\"}]\"}"},{id:commandblock_minecart,Command:"setblock ~10 ~-1 ~1 chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_killstreak_min=5] add 5killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~9 ~-1 ~1 repeating_command_block 4 replace {auto:1b,Command:\"execute @a[tag=!10killstreak,score_killstreak_min=10] ~ ~ ~ tellraw @a [\\\"\\\",{\\\"selector\\\":\\\"@p\\\",\\\"color\\\":\\\"red\\\"},{\\\"text\\\":\\\"\\\\u00a77 is on a kill streak of \\\\u00a7a\\\\u00a7l10\\\\u00a77!\\\"}]\"}"},{id:commandblock_minecart,Command:"setblock ~8 ~-1 ~1 chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_killstreak_min=10] add 10killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~7 ~-1 ~1 repeating_command_block 4 replace {auto:1b,Command:\"execute @a[tag=!15killstreak,score_killstreak_min=15] ~ ~ ~ tellraw @a [\\\"\\\",{\\\"selector\\\":\\\"@p\\\",\\\"color\\\":\\\"red\\\"},{\\\"text\\\":\\\"\\\\u00a77 is on a kill streak of \\\\u00a7a\\\\u00a7l15\\\\u00a77!\\\"}]\"}"},{id:commandblock_minecart,Command:"setblock ~6 ~-1 ~1 chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_killstreak_min=15] add 15killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~5 ~-1 ~1 repeating_command_block 4 replace {auto:1b,Command:\"execute @a[tag=!30killstreak,score_killstreak_min=30] ~ ~ ~ tellraw @a [\\\"\\\",{\\\"selector\\\":\\\"@p\\\",\\\"color\\\":\\\"red\\\"},{\\\"text\\\":\\\"\\\\u00a77 is on a kill streak of \\\\u00a7a\\\\u00a7l30\\\\u00a77!\\\"}]\"}"},{id:commandblock_minecart,Command:"setblock ~4 ~-1 ~1 chain_command_block 4 replace {auto:1b,Command:\"scoreboard players tag @a[score_killstreak_min=30] add 30killstreak\"}"},{id:commandblock_minecart,Command:"setblock ~3 ~-1 ~1 concrete 15"},{id:commandblock_minecart,Command:"setblock ~1 ~-1 ~ wall_sign 4 replace {Text1:\"{\\\"text\\\":\\\"\\\"}\",Text2:\"{\\\"text\\\":\\\"\\\\u00a74Click to\\\"}\",Text3:\"{\\\"text\\\":\\\"\\\\u00a74Destroy\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"minecraft:fill ~ ~-1 ~2 ~12 ~1 ~-1 air\\\"}}\"}"},{id:commandblock_minecart,Command:"tellraw @a [\"\",{\"text\":\"\\u00a7a\\u00a7lKill Streaks\\n\\u00a7cOne Command\\n\\u00a74 - CMDProGamer\"}]"},{id:commandblock_minecart,Command:"setblock ~ ~-2 ~1 command_block 0 replace {auto:1b,Command:\"fill ~-1 ~2 ~ ~ ~-1 ~-1 air\"}"},{id:commandblock_minecart,Command:"minecraft:kill @e[type=commandblock_minecart,r=1]"}]}]}]}