Item Preserve Gem | Minecraft | One Command

/summon FallingSand ~ ~1 ~ {Block:"redstone_block",Time:3,Passengers:[{id:"FallingSand",Block:"activator_rail",Time:3,Passengers:[{id:"MinecartCommandBlock",Command:/gamerule commandBlockOutput false},{id:"MinecartCommandBlock",Command:/scoreboard objectives add ItemPGemCraft stat.deaths},{id:"MinecartCommandBlock",Command:/fill ~2 ~-2 ~-1 ~6 ~3 ~1 minecraft:nether_wart_block 0 hollow},{id:"MinecartCommandBlock",Command:/fill ~2 ~-1 ~-1 ~6 ~2 ~1 minecraft:stained_glass 0 replace nether_wart_block},{id:"MinecartCommandBlock",Command:/summon FallingSand ~3 ~-1 ~ {Block:repeating_command_block,Data:5,TileEntityData:{auto:1b,Command:/scoreboard players set @e[type=Item] ItemPGemCraft -1 {Item:{id:"minecraft:diamond",Count:2b},OnGround:1b}},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:1,TileEntityData:{Command:/scoreboard players tag @a remove HoldItemPGem},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:5,TileEntityData:{Command:/scoreboard players tag @a add HoldItemPGem {Inventory:[{tag:{ItemPGem:1b}}]}},Time:1,Passengers:[{id:"FallingSand",Block:nether_wart_block,Data:0,Time:1}]}]}]}},{id:"MinecartCommandBlock",Command:/summon FallingSand ~4 ~-1 ~ {Block:chain_command_block,Data:5,TileEntityData:{Command:/scoreboard players set @e[type=Item] ItemPGemCraft -2 {Item:{id:"minecraft:ender_chest",Count:1b},OnGround:1b}},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:4,TileEntityData:{Command:/execute @e[score_ItemPGemCraft_min=-3,score_ItemPGemCraft=-3] ~ ~ ~ kill @e[c=2,score_ItemPGemCraft=-1]},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:5,TileEntityData:{Command:/execute @a[tag=HoldItemPGem] ~ ~ ~ /gamerule keepInventory true},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:4,TileEntityData:{Command:/scoreboard players set @a[score_ItemPGemCraft_min=1] ItemPGemCraft 0},Time:1}]}]}]}},{id:"MinecartCommandBlock",Command:/summon FallingSand ~5 ~-1 ~ {Block:chain_command_block,Data:1,TileEntityData:{Command:/execute @e[score_ItemPGemCraft_min=-1,score_ItemPGemCraft=-1] ~ ~ ~ execute @e[score_ItemPGemCraft_min=-2,score_ItemPGemCraft=-2,dx=0] ~ ~ ~ scoreboard players set @e[c=1,score_ItemPGemCraft=-2] ItemPGemCraft -3},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:4,TileEntityData:{Command:/execute @e[score_ItemPGemCraft_min=-3,score_ItemPGemCraft=-3] ~ ~ ~ summon Item ~ ~ ~ {Item:{id:"minecraft:quartz",Count:1b,tag:{ItemPGem:1b,ench:[],display:{Name:"Item Preserve Gem",Lore:["The holder will keep","items upon death."]}}},Motion:[0.0,0.3,0.0]}},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:1,TileEntityData:{Command:/execute @a[tag=!HoldItemPGem] ~ ~ ~ /gamerule keepInventory false},Time:1,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:4,TileEntityData:{auto:0b,Command:/clear @a[score_ItemPGemCraft_min=1] minecraft:quartz 0 1 {ItemPGem:1b}},Time:1}]}]}]}},{id:"MinecartCommandBlock",Command:setblock ~1 ~1 ~ wall_sign 4 0 {Text1:"{\\\"text\\\":\\\"click here\\\",\\\"color\\\":\\\"dark_red\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"/particle explode ~3 ~-.5 ~ 1.25 1.25 1 .01 75 normal\\\"}}",Text2:"{\\\"text\\\":\\\"to remove\\\",\\\"color\\\":\\\"dark_red\\\"}",Text3:"{\\\"text\\\":\\\"this machine\\\",\\\"color\\\":\\\"dark_red\\\"}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~-3 ~-1 ~5 ~2 ~1 air\\\"}}"}},{id:"MinecartCommandBlock",Command:/setblock ~ ~1 ~ command_block 1 0 {auto:1b,Command:fill ~ ~ ~ ~ ~-2 ~ air}},{id:"MinecartCommandBlock",Command:kill @e[r=2,type=MinecartCommandBlock]}]}]}