How to add total from diceroll mechanic?

Example:

Die has 6 faces. 3 Faces have a Symbol, 3 are blank.

I want to add a value for every time a random dice has a face on it.

So:

2 Die roll faces

1 Die does not.

So I want to pick the dice that do have that face, and then add it to get a total Value of 2. Also I want this value to reset every time it's rolled.

It sounds very simple at a glance, but my first attempt had a lot of issues with this. Was giving me more trouble than I originally thought. How would you attack this concept?

for each die=face --> add 1 to variable.total