You will need any color wool or block and snow.
Place the wool in this formation
Place the snow like this
The snow acts like a half slab ahem walked over but will not bring you over a block
Set up like this. You will need fence and carpet
Add the fence
Place carpet like this
Then place carpet for plates
You can walk on top of it like a half slab so they are stools
That's all for now and keep placing blocks!