/give @a minecraft:command_block{display:{Name:"[{\"text\":\"CLEAR 1x1x1\"}]"},BlockEntityTag:{Command:"/fill ~-1 ~-1 ~-1 ~1 ~1 ~1 minecraft:air",auto:1}} 1
/give @a minecraft:command_block{display:{Name:"[{\"text\":\"CLEAR 5x5x5\"}]"},BlockEntityTag:{Command:"/fill ~-5 ~-5 ~-5 ~5 ~5 ~5 minecraft:air",auto:1}} 1
/give @a minecraft:command_block{display:{Name:"[{\"text\":\"CLEAR 5x10x5\"}]"},BlockEntityTag:{Command:"/fill ~-5 ~-10 ~-5 ~5 ~10 ~5 minecraft:air",auto:1}} 1


/give @a minecraft:command_block{display:{Name:"[{\"text\":\"FILL 2x2x2 STONE\"}]"},BlockEntityTag:{Command:"/fill ~-2 ~-2 ~-2 ~2 ~2 ~2 minecraft:stone",auto:1}} 1



/give @a minecraft:command_block{display:{Name:"[{\"text\":\"FILL 1x1x1 TUFF\"}]"},BlockEntityTag:{Command:"/fill ~-1 ~ ~-1 ~1 ~ ~1 minecraft:tuff",auto:1}} 1
/give @a minecraft:command_block{display:{Name:"[{\"text\":\"FILL 3x0x3 GRASS\"}]"},BlockEntityTag:{Command:"/fill ~-3 ~ ~-3 ~3 ~ ~3 minecraft:grass_block",auto:1}} 1