This "1-second blue time" pattern gets you two of four 1600s on the six 1-second blue time boards and sets you up for the third. The pattern ends when you reach the top left corner of the board. At this point you're set up for the third 1600, and with decent timing you'll get it. From there I get the final 1600 without the use of a pattern. The method involves (1) grouping and keeping the red, blue, and pink ghosts together, (2) cleaning up the remaining dots so the red is moving at maximum speed, and (3) waiting for the brown ghost to be in the correct position relative to the group so that he'll join in when I head up top for the final 1600. The idea of grouping is quite involved and takes a lot of practice. Hopefully you can pick up some basic ideas here.