Need help looping items in a chest and removing them

[Hassan7000]

hey im creating a chestsell skript that allow players to easy sell there loot and i dont know how to loop the items in the chest and removing them and how many items there are in the chest and what items

1. 
   

   on sign change:
       if line 1 is "[ChestSell]":
           set line 1 to "&7[&6&lChestSell&7]"
           set line 2 to "&6&l%player%"
           message "&aYou have created a ChestSell"
         
   on rightclick on a chest or trapped chest:
       if type of loop-block is wall sign:
         if line 1 of loop-block is "&7[&6&lChestSell&7]":
           set {chestloc.%player%} to location of loop-block
           remove 1 sign from {_tmpchest}

I have tried something here but its not working

 

[AsuDev]

{_tmpchest} is a local variable and is not set to anything so it won't do anything. Some ways to remove items from a chest are doing "remove %itemstack% from inventory of block at %location%" or "loop all items in inventory of block at %location%"