Throw your seed and sponge

/summon FallingSand ~ ~1 ~ {CustomName:"スポンジSB作成",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"scoreboard objectives add isSponge dummy"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1,Passengers:[{id:"FallingSand",CustomName:"種SB作成",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"scoreboard objectives add isSeed dummy"},Time:1,Passengers:[{id:"FallingSand",CustomName:"クロック上部分",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~2 ~-2 ~ command_block 0 replace {Command:\"fill ~ ~-1 ~ ~3 ~-1 ~ redstone_block\"}"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1,Passengers:[{id:"FallingSand",CustomName:"クロック下部分",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~2 ~-6 ~ command_block 0 replace {Command:\"fill ~ ~1 ~ ~3 ~1 ~ stone\"}"},Time:1,Passengers:[{id:"FallingSand",CustomName:"スポンジ1",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~3 ~-5 ~ command_block 0 replace {Command:\"/scoreboard players set @e[type=Item] isSponge 1 {Item:{id:\\\"minecraft:sponge\\\",Damage:0s}}\"}"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1,Passengers:[{id:"FallingSand",CustomName:"スポンジ2",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~4 ~-7 ~ command_block 0 replace {Command:\"/execute @e[type=Item,score_isSponge=1,score_isSponge_min=1] ~ ~ ~ detect ~ ~ ~ minecraft:water -1 setblock ~ ~ ~ minecraft:sponge\"}"},Time:1,Passengers:[{id:"FallingSand",CustomName:"スポンジ3",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~5 ~-8 ~ command_block 0 replace {Command:\"/execute @e[type=Item,score_isSponge=1,score_isSponge_min=1] ~ ~ ~ detect ~ ~ ~ minecraft:sponge -1 kill @e[type=Item,score_isSponge=1,score_isSponge_min=1,c=1]\"}"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1,Passengers:[{id:"FallingSand",CustomName:"種1",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~3 ~-12 ~ command_block 0 replace {Command:\"/scoreboard players set @e[type=Item] isSeed 1 {Item:{id:\\\"minecraft:wheat_seeds\\\"}}\"}"},Time:1,Passengers:[{id:"FallingSand",CustomName:"種2",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~4 ~-13 ~ command_block 0 replace {Command:\"/execute @e[type=Item,score_isSeed=1,score_isSeed_min=1] ~ ~ ~ detect ~ ~-1 ~ minecraft:farmland -1 setblock ~ ~ ~ minecraft:wheat\"}"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1,Passengers:[{id:"FallingSand",CustomName:"種3",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~5 ~-15 ~ command_block 0 replace {Command:\"/execute @e[type=Item,score_isSeed=1,score_isSeed_min=1] ~ ~ ~ detect ~ ~ ~ minecraft:wheat -1 kill @e[type=Item,score_isSeed=1,score_isSeed_min=1,c=1]\"}"},Time:1,Passengers:[{id:"FallingSand",CustomName:"クロック起動",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"setblock ~2 ~-15 ~ redstone_block 0 replace"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1,Passengers:[{id:"FallingSand",CustomName:"全部消去",CustomNameVisible:1,Tile:command_block,Block:command_block,TileEntityData:{Command:"/fill ~ ~1 ~ ~ ~-17 ~ minecraft:air"},Time:1,Passengers:[{id:"FallingSand",Tile:redstone_block,Block:redstone_block,Time:1}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}]}