A single-wheeled chariot in red and white which represents Lord Surya’s chariot is drawn on the Ratha Saptami day . The Rath or Ratha Saptami Kolam is drawn in front of the Puja happening space. Usually, the puja is conducted near the chariot Kolam. Some people prefer to draw a small Rath Kolam on a wooden piece and place it outdoors and perform the pooja. Here are examples of a few Ratha Saptami Kolams. These are only examples to give an idea. You may also like to read How to do Rath Saptami Pooja?