This image shows a punch needle fabric - Monk's Cloth - available for purchase from the Clever Poppy Shop.
This is an image of step 1 of seed stitch.
This is an image of step 2 of seed stitch.
This is an image of step 3 of seed stitch.
This is an image of step 4 of seed stitch.
This is an image of step 5 of seed stitch.