Hardwood floor on surface definition

Hello guys! I'm relatively new to grass hopper. I tried some tutorials, like the ones about the voronoi tesselation, they're great. Although I am in need of a definition that can create a hardwood floor on a given surface, extrude the pattern and fillet the edges. I'm not quite sure how to go about it. I saw a hardwood floor pattern topic, but it was not onto a surface and I can quite figure out how to bound it to a given surface and it did,t produce the gap between the planks, so I don't think It can be filleted ot someother way to achive the finishing of the plank edges. Can some one help me with this???