I did one of these for my daughter. I did small circles around the dragonflies and used straight lines outward from there to the edge of the quilt. when I got finished the straight lines made the dragonflies look more like they were in flight.
I used a light yellow for the circles and a black for the lines. The I began the lines at the corner in an angle to the dragonfly and then they were eventually straight. I quilted from the corner to the middle and then went to the opposite end and came toward the middle. Hope this makes a little sense.