grammar - Combining imperative mode with the implication of the action

I have two sentences:

1) Do something.
2) That (the action you performed) will make another thing happen.

I'm trying to combine these sentences into one, as they sound dumb to me when used separately. So far I think it should be like this:

Do something, which will make another thing happen.

but I'm not sure if it's correct.

EDIT: Actually, I'm asking for a general rule, but the specific example is:

Press the button. That will make a list with country names appear.