Bad Piggies 21-3

Bad Piggies 21-3 is the third level of Bad Piggies.

Strategy
Fling a Black bird into the top-left pile of stones, clearing out the way by using the blast right after it hit any objects. Then, finish off in the bottom-left, and make sure the bridge had fallen in the middle. If needed, fire the next Black bird through the gap, clearing the glass structures on the right side.