is there any way to make it so when someone right clicks on a furnace its powered on for like 3 seconds

[Turtle41]

im bad at coding

 

[ChedRed / CardRed]

I think so. You should be able to detect the furnace they player is looking at, set the furnace location to a variable (set variable to game value), and then use the netherrack code block to modify the furnace’s fuel level.

<> = chest items

Code:
set variable block <%uuid variable name> <game value (r-click, then look in location tab)> netherrack block <%uuid variable name>