Gobelin Filling Stitch:
This stitch is quick to work.
Bring the needle up at A, move up 6 threads, and down at B. Move over 2 threads and down 6 threads, and bring the needle up at C. Move up 6 threads, and bring the needle down at D. Continue in this manner - up at E, down at F, up at G, down at H.

Now we move on to the next row. Starting where we left off at H, move down to 3 threads below G and over 1 thread - this will bring the needle up at I. From I, go up 6 threads and down at J. Continue in this manner until you finish the row at P.

Add as many rows as you need, making sure that each row overlaps the previous row by 3 threads (as pictured below).
Gobelin Filling Stitch