Once the Prophet prayed on a Khamisa with marks on it and said, “The marks on it diverted my attention, take this Khamisa to Abu Jahm and bring an Inbijaniya (from him.)”
The place where you pray: your musalla, or the saff at the masjid should be as plain as possible. ‘Marks’ or design on it distracts you from prayer. It’s true. One gets lost in the design instead of concentrating on the prayer.
Bring in a plain prayer mat for yourself and feel the difference in Salah. :)