A great project by interior designers Kalb Lempereur... The idea was to open the space by using materials to deal with the transitions between the 'wet' area and the 'dry' area. The dry area is covered with solid wood on the floor, and tiles with the same shape are used in the wet area.
Looks like they wrote on a door, i could do this on my front door instead of a wreath
Painted wood floor: fill in any large gouges or scrapes, and sand the entire floor lightly. you can use nearly any paint on the floor, but if you're concerned about it rubbing off with traffic, talk to the people in the paint store/department. you can also get clear acrylic sealer to paint over the floor once it's dried and once cured, it'll protect the paint job.