my first command

summon FallingSand ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:FallingSand,Block:redstone_block,Time:1,Passengers:[{id:FallingSand,Block:activator_rail,Time:1,Passengers:[{id:MinecartCommandBlock,Command:gamerule commandBlockOutput false},{id:MinecartCommandBlock,Command:"fill ~2 ~-3 ~-1 ~8 ~-1 ~1 air 0 hollow"},{id:MinecartCommandBlock,Command:"fill ~2 ~-2 ~-1 ~8 ~-2 ~1 coal_block 0 replace air"},{id:MinecartCommandBlock,Command:"/scoreboard objectives add SuperMiner stat.useItem.minecraft.diamond_pickaxe"},{id:MinecartCommandBlock,Command:"/fill ~ ~-2 ~ ~20 ~2 ~ minecraft:glowstone 0 replace coal_block"},{id:MinecartCommandBlock,Command:"/setblock ~3 ~-1 ~ minecraft:lever 5"},{id:MinecartCommandBlock,Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{\\\"text\\\":\\\"Created by\\\",\\\"color\\\":\\\"dark_red\\\"}",Text2:"{\\\"text\\\":\\\"Arnon001\\\",\\\"color\\\":\\\"gold\\\",\\\"italic\\\":true,\\\"bold\\\":true}",Text3:"{\\\"text\\\":\\\"~~~~~~~~~~~~~~\\\",\\\"color\\\":\\\"gray\\\"}",Text4:"{\\\"text\\\":\\\"REMOVE?\\\",\\\"color\\\":\\\"dark_red\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~-1 ~-1 ~7 ~1 ~1 air\\\"},\\\"bold\\\":true}"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~ chain_command_block 1 replace {auto:1,Command:"/scoreboard players tag @e[type=Item,tag=!Falled] add Falled"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/scoreboard players set @a SuperMiner 0"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/execute @e[score_SuperMiner_min=1] ~ ~ ~ /kill @e[type=Item,c=1,tag=!Falled]"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/execute @e[score_SuperMiner_min=1] ~ ~ ~ /execute @e[type=Item,c=1,tag=!Falled] ~ ~ ~ /particle lava ~ ~ ~ 0.5 0.5 0.5 1 100 force"}},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ repeating_command_block 5 replace {auto:0,Command:"/execute @e[score_SuperMiner_min=1] ~ ~ ~ /execute @e[type=Item,c=1,tag=!Falled] ~ ~ ~ /give @p minecraft:diamond 1"}},{id:MinecartCommandBlock,Command:setblock ~ ~ ~1 command_block 0 replace {Command:fill ~ ~-3 ~-1 ~ ~ ~ air}},{id:MinecartCommandBlock,Command:setblock ~ ~-1 ~1 redstone_block},{id:MinecartCommandBlock,Command:kill @e[type=MinecartCommandBlock,r=1]}]}]}]}