[1.12] Redstone Spawn Chunks

summon falling_block ~ ~.6 ~ {Block:chain_command_block,TileEntityData:{Command:"fill ~ ~ ~ ~ ~2 ~ air"},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:"gamerule logAdminCommands false"},{id:commandblock_minecart,Command:"gamerule randomTickSpeed 0"},{id:commandblock_minecart,Command:"gamerule spawnRadius 0"},{id:commandblock_minecart,Command:"gamerule spectatorsGenerateChunks false"},{id:commandblock_minecart,Command:"gamerule doMobSpawning false"},{id:commandblock_minecart,Command:"gamerule keepInventory true"},{id:commandblock_minecart,Command:"gamerule mobGriefing false"},{id:commandblock_minecart,Command:"gamerule doDaylightCycle false"},{id:commandblock_minecart,Command:"weather clear 1000000"},{id:commandblock_minecart,Command:"minecraft:weather clear 1000000"},{id:commandblock_minecart,Command:"time set 1500"},{id:commandblock_minecart,Command:"setworldspawn 0 15 0"},{id:commandblock_minecart,Command:"summon area_effect_cloud 16 0 0 {CustomName:\"spawnGen\",Tags:[\"spawnGen\"],Particle:take,Radius:0.0001f,Duration:3}"},{id:commandblock_minecart,Command:"summon area_effect_cloud 0 0 16 {CustomName:\"spawnGen\",Tags:[\"spawnGen\"],Particle:take,Radius:0.0001f,Duration:3}"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ summon area_effect_cloud ~ ~ ~64 {CustomName:\"spawnGen\",Tags:[\"spawnGen\"],Particle:take,Radius:0.0001f,Duration:3}"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ summon area_effect_cloud ~ ~ ~32 {CustomName:\"spawnGen\",Tags:[\"spawnGen\"],Particle:take,Radius:0.0001f,Duration:3}"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ summon area_effect_cloud ~64 ~ ~ {CustomName:\"spawnGen\",Tags:[\"spawnGen\"],Particle:take,Radius:0.0001f,Duration:3}"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ summon area_effect_cloud ~32 ~ ~ {CustomName:\"spawnGen\",Tags:[\"spawnGen\"],Particle:take,Radius:0.0001f,Duration:3}"},{id:commandblock_minecart,Command:"fill 0 3 0 127 3 127 air"},{id:commandblock_minecart,Command:"fill 0 2 0 127 2 127 air"},{id:commandblock_minecart,Command:"fill 0 1 0 127 1 127 air"},{id:commandblock_minecart,Command:"fill 0 0 0 127 0 127 concrete color=cyan"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ fill ~ ~ ~ ~15 ~ ~15 concrete color=gray"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ fill ~-1 ~ ~-1 ~ ~ ~ concrete color=silver"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ setblock ~ ~ ~-1 concrete color=light_blue"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ setblock ~-1 ~ ~ concrete color=light_blue"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~16 ~ ~ fill ~-1 ~ ~-1 ~ ~ ~ concrete color=light_blue"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~16 ~ ~ setblock ~ ~ ~-1 concrete color=silver"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~16 ~ ~ setblock ~-1 ~ ~ concrete color=silver"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~16 fill ~-1 ~ ~-1 ~ ~ ~ concrete color=light_blue"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~16 setblock ~ ~ ~-1 concrete color=silver"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~16 setblock ~-1 ~ ~ concrete color=silver"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~16 ~ ~16 fill ~-1 ~ ~-1 ~ ~ ~ concrete color=silver"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~16 ~ ~16 setblock ~ ~ ~-1 concrete color=light_blue"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~16 ~ ~16 setblock ~-1 ~ ~ concrete color=light_blue"},{id:commandblock_minecart,Command:"setblock 0 0 0 concrete color=light_blue"},{id:commandblock_minecart,Command:"setblock 127 0 127 concrete color=light_blue"},{id:commandblock_minecart,Command:"execute @e[tag=spawnGen] ~ ~ ~ summon fireworks_rocket ~ ~1 ~ {LifeTime:0,FireworksItem:{id:fireworks,Count:1,tag:{Fireworks:{Explosions:[{Type:0,Trail:1,Colors:[I;4771791,6710886],FadeColors:[I;6710886,4771791]}]}}}}"},{id:commandblock_minecart,Command:"kill @e[tag=spawnGen]"},{id:commandblock_minecart,Command:"minecraft:kill @e[tag=spawnGen]"},{id:commandblock_minecart,Command:"fill -3 0 -3 128 3 -1 air"},{id:commandblock_minecart,Command:"fill -3 0 -1 -1 3 128 air"},{id:commandblock_minecart,Command:"fill -1 0 0 -1 0 128 concrete color=black"},{id:commandblock_minecart,Command:"fill -1 0 -1 128 0 -1 concrete color=black"},{id:commandblock_minecart,Command:"fill 0 0 128 128 0 128 concrete color=black"},{id:commandblock_minecart,Command:"fill 128 0 0 128 0 127 concrete color=black"},{id:commandblock_minecart,Command:"setblock -3 1 -3 concrete color=black"},{id:commandblock_minecart,Command:"fill -2 1 -3 1 1 -3 concrete color=red"},{id:commandblock_minecart,Command:"fill -3 1 -2 -3 1 1 concrete color=blue"},{id:commandblock_minecart,Command:"fill -3 2 -3 -3 5 -3 concrete color=lime"},{id:commandblock_minecart,Command:"tellraw @a [{\"text\":\"\\nRedstone Spawn Chunks\",\"color\":\"dark_aqua\"},{\"text\":\" by \",\"color\":\"aqua\"},{\"text\":\"MatrixTunnel\",\"color\":\"light_purple\"},{\"text\":\" [1.12]\",\"color\":\"gray\"}]"},{id:commandblock_minecart,Command:"blockdata ~ ~-3 ~ {Command:\"\",auto:0}"},{id:commandblock_minecart,Command:"setblock ~ ~-1 ~ command_block 0 1 {auto:1,Command:\"kill @e[type=commandblock_minecart,r=1]\"}"}]}]}]}