they're set up like this 3rdgreen, 2ndgreen, 1stgreen, 1stbrown, 2ndbrown 3rd brown..

click 1brown, 1green, 2nd green, 1st brown, 2nd brown, 3rd brown, 1st green, 2nd green, 3rd green, 1st brown, 2nd brown, 3rd brown, 2nd green, 3rd green, 3rd brown