Last spring I made a court yard effect on the side of my house with 16" patio blocks. The space is about 6' x 25' with a grouting area between blocks of 4". This year I would like to take the grass out between the blocks and grow moss. What would be the best and easiest way to go about this and what type of moss should I use that would take foot traffic? The area is in a southern exposure and gets some pretty intense sun mid-afternoon on. Thank you in advance.