Master command block!

redstone block fill command:
fill ~ ~1 ~1 ~ ~[do how ever much command blocks you have and add 1 remember!] ~1 redstone_block

air fill command:
fill ~ ~1 ~1 ~ ~[do how ever much command blocks you have and minus 1 remember!] ~ air

linking the commands in the master command block:
id:FallingSand,Time:100,Block:command_block,TileEntityData:{Command:""},Riding:{}

starting the master command off:
summon FallingSand ~ ~1 ~ {Time:1,Riding:{[put the linking block of tags here!]}}

the command i used in the tutorial:
summon FallingSand ~ ~1 ~ {Time:1,Riding:{id:FallingSand,Time:100,Block:command_block,TileEntityData:{Command:"fill ~ ~1 ~1 ~ ~-4 ~ air"},Riding:{id:FallingSand,Time:100,Block:command_block,TileEntityData:{Command:"setblock ~2 ~-2 ~ lever 6"},Riding:{id:FallingSand,Time:100,Block:command_block,TileEntityData:{Command:"setblock ~2 ~-2 ~ quartz_block"},Riding:{id:FallingSand,Time:100,Block:command_block,TileEntityData:{Command:"setblock ~2 ~-2 ~ sticky_piston 1"},Riding:{id:FallingSand,Time:100,Block:command_block,TileEntityData:{Command:"fill ~ ~1 ~1 ~ ~4 ~1 redstone_block"}}}}}}}