Why isn't the subtract block working?

[SushiDude]

I'm making a start down timer but when I decrease the variable it doesn't go down?

 

[Jeremaster]

Subtract takes the var and two arguments (var = x - y). You could put another copy of the var item in the second slot to do var = (var - y). Alternatively, you could leave the items as-is and use the Decrement block (var -= y).

 

[SushiDude]

Thank you so much! :)