I’m no expert on laying patio blocks and pavers, but my neighbor had to move and had a pallet of about 60 16”x16” blocks and some wall blocks left over from a walkway he put in last year. Since I wanted to add a walkway out of the patio room side door, he sold me the load for about 1/3 price and hauled it all up to my yard. So I expanded the plan to go from the side door and wrap around the hot tub at the edge of the concrete slab portion of the patio. Since the slab slopes both back and to side, I decided to start at the lowest area and work back from there. I used a 6’ pipe from my longest clamp with my level to get things close to the right slope. A planed out section of 2x for checking the slope across the width. I never lived anywhere with such rock hard gravel under the sod. Anyway this is about half way.