Thread your embroidery needle with about 18-24 inches of thread. Try not to go longer than that or the thread will tangle as you sew. Knot one end and insert the needle from the bottom of one of your lines closest to the edge of the pant leg. Be sure to go through the patch fabric and the top of the pant leg. You will be using a “running stitch.” Insert the needle through the fabric without pulling the thread through. The stitch should be about ¼ inch long. Run the needle through the fabric without pulling the thread through until you have multiple stitches on the needle. If they are not uniform, no worries. It takes practice. As you near the end of the line, make sure you end each row with the needle on the underside of the patch. Start the next row by bringing the needle up through the top of the next line.