Bring the needle out at A and make a diagonal stitch to B, an equal distance up and to the left of A. Bring the needle out at C, directly below B and level with A.
Make a second diagonal stitch to D, immediately above A and level with B. To work a second adjoining cross, bring the needle out at C again.
Work cross stitches in the same way across the row. Complete all the A to B stitches first and then go back along the row doing C to D for a neater finish.