Hi threedsnack -
Ok so this took a little trial and error to get the look you are after, but you will want to adjust the Red Square spawn Rate to a Constant 12 with the Blue Square spawn Rate to a Constant 2. Finally change the emitter duration of the blueP to 0.5. This should duplicate the effect without giving the Red Squares a chance to return to the Emitter Origin.
Thank You
Eric Ketchum