How do you make the triangle vacuum marks like at open houses and model homes?

Question : How do you make the triangle vacuum marks like at open houses and model homes?
You know what I’m talking about…the long, thin triangles in the carpet pile that have that “just vacuumed” look when you go to view houses. Do you do that with a vacuum, or is there some random tool people use?
and I mean SPECIFICIALLY, HOW (what method) do you use…
triangle homes

Best answer:

Answer by Laura
It’s done with a vacuum cleaner, but it doesn’t work on all carpets. It depends on the pile, and if your carpet doesn’t show the vacuum tracks, it just won’t work.