How to make an enemy emit an object on a timer?

I’m making a game, I’m not the most experienced person but I know most basics and how to set everything up, however, in my game I’m trying to make an enemy emit an object on a timer and the thing is I want it to be a fifty/fifty chance of emitting. Does anyone know how to do this?

timer into random into two filters (one being 1-5 (less than or equal to 5) and the other being greater than or equal to) then one going into the emit