In villages and towns the women are very interested to decorate there houses with various types of Rangoli Desings especially for Sankranti, and on Radha saptami festival the houses are decorated with Ratham rangoli desings.
Ratha Saptami is a Hindu festival that falls on the seventh day (Saptami) in the bright half (Shukla Paksha) of the Hindu month Maagha.It marks the seventh day following the Sun’s northerly movement (Uttarayana). It is symbolically represented in the form of the Sun God
Surya turning his Ratha drawn by seven horses (representing seven colours) towards the northern hemisphere, in a north-easterly direction. It also marks the birth of Surya and hence celebrated as Surya Jayanti (the Sun-god’s birthday).
You can find some patterns of Ratham rangoli designs.