This Is a "Automatic Furnace with loading bar" like i i've said in the title ! It's smelts or cook your items and when the loading bar is flickering then you should press the two buttons in the order ( 1 then 2 ) the minecart will come with a chest that has what you've wanted to smelt !
Take This in mind :
-You will need to cook with : ( + mean that is correct )
+ 1 coal for 8 items ; (correct) ( x mean that is not correct)
x 1 coal for 9 or a bigger amount of items ; ( not correct )
x 1 coal for 7 or a smaller amount of items .(not correct )
You can copy this structure to your world but if you want to upload it on YouTube please say who is the creator ( Me :3 )
CREATIONS
MINECRAFT-SCHEMATICS.COM