@iSutchel - Brush

/summon FallingSand ~ ~2 ~ {Time:1,Block:redstone_block,Motion:[.0,-10.0,.0],Riding:{id:FallingSand,Riding:{id:FallingSand,Time:1,Block:activator_rail,Motion:[.0,-8.0,.0],Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"gamerule commandBlockOutput false",Motion:[.0,-5.0,.0],Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"gamerule logAdminCommands false",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"scoreboard objectives add Lifetime dummy",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"setblock ~5 ~ ~ command_block 0 replace {Command:\"summon FallingSand ~ ~1 ~ {Block:redstone_block}\"}",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"setblock ~5 ~2 ~ command_block 0 replace {Command:\"scoreboard players add @e[type=Arrow] Lifetime 1\"}",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"setblock ~4 ~1 ~ command_block 0 replace {Command:\"kill @e[score_Lifetime_min=31,type=Arrow]\"}",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"setblock ~6 ~1 ~ command_block 0 replace {Command:\"execute @e[score_Lifetime_min=30,score_Lifetime=30,type=Arrow] ~ ~ ~ fill ~-7 ~-7 ~-7 ~7 ~7 ~7 air\"}",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"setblock ~5 ~1 ~ redstone_block 0 destroy",Riding:{id:FallingSand,Riding:{id:MinecartCommandBlock,Command:"setblock ~ ~-2 ~ fire",Motion:[.0,.1,.0],Riding:{id:FallingSand}}}}}}}}}}}}}}}}}}}}}}