Do each color 2 x with a little extra the length of the project. Use first color for length then pull the 2nd color same length, thread each end normal. The take the opposite cor and go 3/4" of the opposite color pierce and seat the needle again with each. Pull taunt. It will create a min joining knot do not cut the ends. Pull even lengths as normal.through the first whole. Center the knot do not cut the excess. Saddle stitch and it will alternate colors.