To use this command give yourshelf a command block by:
/give @p command_block
Then place the command block and paste in the command.
Then power the command block.
If you want the command to work everywhere place the command block in the spawn chunks.
Or you can set the world spawn at the machine with /setworldspawn

Command:

/summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~ ~ ~1 ~ ~-25 ~1 redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~ ~2 ~ ~ ~-26 ~1 air},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~3 ~-5 ~ {Block:command_block,Time:1,TileEntityData:{Command:fill ~ ~ ~-1 ~6 ~ ~1 stained_hardened_clay 3}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard objectives add fire dummy},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard objectives add getitems dummy},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~4 ~-15 ~-1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[name=Smoke_Bomb] ~ ~ ~ particle cloud ~ ~ ~ 1 1 1 0.1 9999},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @a ~ ~ ~ execute @e[type=Snowball,c=1] ~ ~ ~ summon Fireball ~ ~ ~ {ExplosionPower:2,direction:[]}},Time:1,}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~5 ~-14 ~-1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[type=Arrow] ~ ~ ~ summon FallingSand ~ ~1 ~ {Block:"minecraft:fire",Time:100}},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~6 ~-13 ~-1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @p[score_getitems_min=1] ~ ~ ~ give @p bow},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~7 ~-12 ~-1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @p[score_getitems_min=1] ~ ~ ~ give @p arrow 64},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~8 ~-11 ~-1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @p[score_getitems_min=1] ~ ~ ~ scoreboard players set @p getitems 0},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~9 ~-10 ~-1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[type=Arrow,score_fire_min=1,score_fire=1] ~ ~ ~ kill @e[type=Arrow] {inGround:1b}},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~4 ~-10 ~1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/kill @e[name=Smoke_Bomb]},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[type=Fireball] ~ ~ ~ particle flame ~ ~ ~ 0.1 0.1 0.1 5 100},Time:1,}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~5 ~-9 ~1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[type=Arrow] ~ ~ ~ particle flame ~ ~ ~ 0.1 0.1 0.1 5 100},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~6 ~-8 ~1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @p[score_getitems_min=1] ~ ~ ~ give @p snowball 16},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~7 ~-7 ~1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @p[score_getitems_min=1] ~ ~ ~ give @p spawn_egg 64 67 {display:{Name:"Smoke_Bomb"}}},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~8 ~-6 ~1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard players set @e[type=Arrow] fire 1 {inGround:1b}},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon FallingSand ~9 ~-5 ~1 {Block:stained_hardened_clay,Data:3,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute @e[name=Smoke_Bomb] ~ ~ ~ effect @p 14 6 0 true},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:gamerule commandBlockOutput false},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~3 ~-6 ~ ~9 ~-5 ~ redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:setblock ~3 ~-5 ~-1 command_block 0 replace {Command:fill ~ ~ ~1 ~6 ~1 ~1 stone 0 replace redstone_block}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:setblock ~3 ~-4 ~1 command_block 0 replace {Command:fill ~ ~ ~-1 ~6 ~1 ~-1 redstone_block 0 replace stone}},Time:1,Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:'',clickEvent:{action:run_command,value:\\"/fill ~ ~-2 ~-2 ~9 ~3 ~2 air 0 replace\\"},color:black}",Text2:"{text:'Destroy machine',color:red}",Text3:"{text:'',color:black}",Text4:"{text:'',color:black}"}},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:'',clickEvent:{action:run_command,value:\\"/scoreboard players set @p getitems 1\\"},color:black}",Text2:"{text:'Get items',color:dark_purple}",Text3:"{text:'Wizard powers',color:dark_blue}",Text4:"{text:'by:xxhd23',color:green}"}},Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~2 ~-1 ~-2 ~10 ~0 ~2 stained_glass 11 replace stained_hardened_clay 3},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~3 ~ ~-1 ~9 ~4 ~1 air 0 replace stained_hardened_clay 3},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill ~2 ~ ~-2 ~10 ~3 ~2 stained_hardened_clay 3},Time:1,Riding:{id:FallingSand,Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}}}}}}}}}