Conveyor Belts with Only One Command 1.8

/summon MinecartCommandBlock ~ ~1 ~ {Command:kill @e[type=MinecartCommandBlock,r=1],Riding:{id:MinecartCommandBlock,Command:setblock ~ ~-1 ~1 redstone_block,Riding:{id:MinecartCommandBlock,Command:setblock ~ ~ ~1 command_block 0 replace {Command:fill ~ ~-3 ~-1 ~ ~ ~ air},Riding:{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ redstone_block,Riding:{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~-1 command_block 0 replace {Command:fill ~ ~ ~1 ~4 ~ ~1 stone},Riding:{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~1 command_block 0 replace {Command:fill ~ ~ ~-1 ~4 ~ ~-1 redstone_block},Riding:{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~-1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 6 tp @e[c=1] ~ ~ ~-0.2"},Riding:{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 5 tp @e[c=1] ~0.2 ~ ~"},Riding:{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~-1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 3 tp @e[c=1] ~ ~ ~0.2"},Riding:{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 1 tp @e[c=1] ~0.2 ~ ~"},Riding:{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~-1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 7 tp @e[c=1] ~ ~ ~0.2"},Riding:{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 4 tp @e[c=1] ~-0.2 ~ ~"},Riding:{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~-1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 2 tp @e[c=1] ~ ~ ~-0.2"},Riding:{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~1 command_block 0 replace {Command:"/execute @e ~ ~ ~ detect ~ ~-2 ~ stone_stairs 0 tp @e[c=1] ~-0.2 ~ ~"},Riding:{id:MinecartCommandBlock,Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:\\\"================\\\",color:black}",Text2:"{text:\\\"Klick hier um die\\\",color:black}",Text3:"{text:\\\"Box zu zerstören\\\",color:black}",Text4:"{text:\\\"================\\\",color:black,clickEvent:{action:\\\"run_command\\\",value:\\\"fill ~ ~-1 ~-2 ~8 ~2 ~2 air\\\"}}"},Riding:{id:MinecartCommandBlock,Command:fill ~2 ~-2 ~-2 ~8 ~-2 ~2 stained_glass 0 replace iron_block 0,Riding:{id:MinecartCommandBlock,Command:fill ~2 ~-3 ~-2 ~8 ~-1 ~2 iron_block 0 hollow,Riding:{id:MinecartCommandBlock,Command:gamerule commandBlockOutput false,Riding:{id:MinecartCommandBlock,Riding:{id:FallingSand,Block:activator_rail,Time:1,Riding:{id:FallingSand,Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}}}