It looks complicated, but after making a few stitches I found the rhythm.
From there on, it became addictive.
Begin by making a horisontal Straight Stitch,
then come out below the middle of it.
Starting from the left corner,
make a slanting 'Chain Stitch' .
Make a horisontal Straight Stitch,
starting from the right side,
and coming out in the lower middle hole, above the first Straight Stitch.
Insert the tip of the needle in the hole at the top,
come out a bit above it,
then make a Twisted Chain Stitch.
Anchor at the top,
Make a new stitch to the right.
Continue in the same way.
Homework:
Add to the three usual samplers