Based on information submitted by the DPRK to international organizations prior to launch, the folks at Analytical Graphics have produced a good-looking computer simulation of what the Unha-3 launch might look like.
The simulation lacks of the most recent theories on the precise launch path, such as a slight dog-leg turn in the trajectory of the satellite when the third stage separates, but that’s not too important.
Take a look and you’ll have a good feel for the path of the rocket and how the first and second stages will drop into the ocean.