You might only look at a doormat in passing, but you still see it several times a day. Some get tatty quickly and some are useless for scraping the mud off your shoes - a timber slat model does that job and stays looking good for longer.
Step 1 - Measure and mark a series of 40 x 20mm slats using a square as a guide, before cutting to length on the waste side of the line. I cut 11 lengths at 750mm to give me the desired effect.
Step 2 - Remove all sharp edges on the slats, including the ends, with a plane, then finish off with a light sand.
Step 3 - Paint or stain the slats separately.