Clone Clock Reverse Order

summon MinecartCommandBlock ~ ~1.5 ~ {Riding:{id:MinecartCommandBlock,Riding:{id:MinecartCommandBlock,Riding:{id:MinecartCommandBlock,Riding:{id:MinecartCommandBlock,Riding:{id:MinecartCommandBlock,Riding:{id:MinecartCommandBlock,Riding:{id:MinecartCommandBlock,Riding:{id:FallingSand,Time:1,Block:activator_rail},Command:setblock ~1 ~-2 ~ command_block 0 replace {Command:clone ~ ~1 ~ ~3 ~1 ~ ~ ~1 ~ replace move}},Command:setblock ~2 ~-2 ~ command_block 0 replace {Command:say 1}},Command:setblock ~3 ~-2 ~ command_block 0 replace {Command:say 2}},Command:setblock ~4 ~-2 ~ command_block 0 replace {Command:say 3}},Command:fill ~1 ~-1 ~ ~4 ~-1 ~ redstone_block},Command:setblock ~ ~2 ~ command_block 0 replace {Command:fill ~ ~-3 ~ ~ ~ ~ air}},Command:setblock ~ ~1 ~ redstone_block},Command:kill @e[r=0]}