1 player map

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 ~2 ~-3 ~-2 ~8 ~-1 ~2 concrete 5 hollow"},{id:commandblock_minecart,Command:"fill ~2 ~-2 ~-2 ~8 ~-2 ~2 stained_glass 5 0 concrete"},{id:commandblock_minecart,Command:"/kill @e[tag=followPlayer]"},{id:commandblock_minecart,Command:"/gamerule sendCommandFeedback false"},{id:commandblock_minecart,Command:"/gamerule commandBlockOutput false"},{id:commandblock_minecart,Command:"/summon area_effect_cloud ~ ~ ~ {Tags:[\"followPlayer\"],NoGravity:1b,Duration:2147483647,Particle:\"take\"}"},{id:commandblock_minecart,Command:"/scoreboard objectives add quits stat.leaveGame"},{id:commandblock_minecart,Command:"/tellraw @a [\"\",{\"text\":\"\\n\"},{\"text\":\"- - - - - - - -\",\"color\":\"green\"},{\"text\":\"\\n\"},{\"text\":\"1 player only map\",\"color\":\"dark_green\"},{\"text\":\"\\n\"},{\"text\":\"by NICO_THE_PRO\\n- - - - - - - -\",\"color\":\"green\"},{\"text\":\"\\n\"},{\"text\":\"How it works\",\"color\":\"dark_green\"},{\"text\":\"\\n\"},{\"text\":\"If multiple players are playing\\nthis map, every player except\\none will be in spectator mode\\nIf the player in adventure mode\\ndisconnects, another player will\\nbe picked randomly from the ones\\nin spectator mode\\n- - - - - - - -\",\"color\":\"green\"}]"},{id:commandblock_minecart,Command:"/playsound entity.player.levelup master @a ~ ~ ~ 1000000"},{id:commandblock_minecart,Command:"fill ~3 ~-2 ~-1 ~7 ~-2 ~1 chain_command_block 5"},{id:commandblock_minecart,Command:"setblock ~7 ~-2 ~1 chain_command_block 1"},{id:commandblock_minecart,Command:"setblock ~3 ~-2 ~ chain_command_block 3"},{id:commandblock_minecart,Command:"fill ~7 ~-2 ~ ~4 ~-2 ~ chain_command_block 4"},{id:commandblock_minecart,Command:"setblock ~7 ~-2 ~-1 chain_command_block 3"},{id:commandblock_minecart,Command:"setblock ~3 ~-2 ~-1 repeating_command_block 5"},{id:commandblock_minecart,Command:"blockdata ~7 ~-2 ~1 {auto:1,Command:\"/execute @e[score_quits_min=1] ~ ~ ~ scoreboard players reset @s quits\"}"},{id:commandblock_minecart,Command:"blockdata ~6 ~-2 ~1 {auto:1,Command:\"/execute @e[score_quits_min=1] ~ ~ ~ scoreboard players tag @s remove new\"}"},{id:commandblock_minecart,Command:"blockdata ~5 ~-2 ~1 {auto:1,Command:\"/execute @e[score_quits_min=1] ~ ~ ~ scoreboard players tag @s remove Player\"}"},{id:commandblock_minecart,Command:"blockdata ~4 ~-2 ~1 {auto:1,Command:\"/tp @e[tag=followPlayer] @a[tag=Player]\"}"},{id:commandblock_minecart,Command:"blockdata ~3 ~-2 ~1 {auto:1,Command:\"/scoreboard players tag @a[tag=!new] add new\"}"},{id:commandblock_minecart,Command:"blockdata ~3 ~-2 ~ {auto:1,Command:\"/scoreboard players tag @a[tag=!new] remove newPlayer\"}"},{id:commandblock_minecart,Command:"blockdata ~4 ~-2 ~ {auto:1,Command:\"/execute @e[tag=Player] ~ ~ ~ execute @s[tag=!newPlayer] ~ ~ ~ scoreboard players tag @s add newPlayer\"}"},{id:commandblock_minecart,Command:"blockdata ~5 ~-2 ~ {auto:1,Command:\"/execute @e[tag=Player] ~ ~ ~ execute @s[tag=!newPlayer] ~ ~ ~ gamemode 2 @s\"}"},{id:commandblock_minecart,Command:"blockdata ~6 ~-2 ~ {auto:1,Command:\"/execute @e[tag=Player] ~ ~ ~ execute @s[tag=!newPlayer] ~ ~ ~ tp @s @e[tag=followPlayer]\"}"},{id:commandblock_minecart,Command:"blockdata ~7 ~-2 ~ {auto:1,Command:\"/gamemode 3 @a[tag=NotPlayer]\"}"},{id:commandblock_minecart,Command:"blockdata ~7 ~-2 ~-1 {auto:1,Command:\"/scoreboard players tag @r[tag=!NotPlayer] add Player\"}"},{id:commandblock_minecart,Command:"blockdata ~6 ~-2 ~-1 {auto:1,Command:\"/execute @e[tag=Player] ~ ~ ~ scoreboard players tag @a[tag=!Player] add NotPlayer\"}"},{id:commandblock_minecart,Command:"blockdata ~5 ~-2 ~-1 {auto:1,Command:\"/scoreboard players tag @a remove NotPlayer\"}"},{id:commandblock_minecart,Command:"blockdata ~4 ~-2 ~-1 {auto:1,Command:\"/scoreboard players tag @a[tag=!new] remove Player\"}"},{id:commandblock_minecart,Command:"blockdata ~3 ~-2 ~-1 {auto:1,Command:\"/tp @a[tag=!new] @e[tag=followPlayer]\"}"},{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]"}]}]}]}