summon falling_block ~ ~1 ~ {BlockState:{Name:stone},Time:1,Passengers:[{id:falling_block,BlockState:{Name:redstone_block},Time:1,Passengers:[{id:falling_block,BlockState:{Name:activator_rail},Time:1,Passengers:[{id:command_block_minecart,Command:"gamerule commandBlockOutput false"},{id:command_block_minecart,Command:"fill ~2 ~-3 ~-1 ~5 ~-1 ~1 gray_terracotta hollow"},{id:command_block_minecart,Command:"fill ~2 ~-2 ~-1 ~5 ~-2 ~1 blue_stained_glass replace gray_terracotta"},{id:command_block_minecart,Command:"fill ~3 ~-2 ~ ~4 ~-2 ~ chain_command_block[facing=east]"},{id:command_block_minecart,Command:"setblock ~3 ~-2 ~ repeating_command_block[facing=east]"},{id:command_block_minecart,Command:"data merge block ~4 ~-2 ~ {auto:1,Command:\"/replaceitem entity @p weapon.offhand minecraft:crossbow{ChargedProjectiles:[{id:\\\"minecraft:arrow\\\",Count: 1b},{id:\\\"minecraft:arrow\\\",Count: 1b},{id:\\\"minecraft:arrow\\\",Count: 1b}],Charged:1b}\"}"},{id:command_block_minecart,Command:"data merge block ~3 ~-2 ~ {auto:1,Command:\"/execute if entity @e[limit=1,type=minecraft:arrow,nbt={inGround:1b}] run kill @e[type=arrow,limit=1]\"}"},{id:command_block_minecart,Command:"setblock ~ ~ ~1 command_block{Command:\"fill ~ ~-3 ~-1 ~ ~ ~ air\"}"},{id:command_block_minecart,Command:"setblock ~ ~-1 ~1 redstone_block"},{id:command_block_minecart,Command:"kill @e[type=command_block_minecart,distance=..1]"}]}]}]}