Tracking In One Command

/summon FallingSand ~ ~1 ~ {Block:redstone_block,Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:"/fill ~-1 ~ ~ ~-1 ~-4 ~ redstone_block"},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/setblock ~-1 ~ ~2 minecraft:command_block 0 Replace {Command:"/fill ~1 ~ ~ ~1 ~ ~3 air"}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/setblock ~1 ~1 ~2 minecraft:command_block 0 Replace {Command:"/fill ~-1 ~ ~ ~-1 ~ ~3 redstone_block"}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:/setblock ~1 ~2 ~3 minecraft:command_block 0 Replace {Command:"/execute @e[type=!Item,!ArmorStand,!MinecartRidable,!FallingSand,!Snowball,!Arrow,PrimedTnt] ~ ~ ~ /particle footstep ~ ~0.1 ~ 0.4 0 0.4 0 1 force"}},Time:1,Riding:{id:"FallingSand",Block:command_block,TileEntityData:{Command:""},Time:1}}}}}}