All the festivals in Hindu Dharma, including religious rituals are related to Deities. The Principle of a specific Deity is present in the atmosphere in a larger proportion on the day of the respective festival or is attracted to the venue where religious rituals of that Deity are being performed. Rangolis too attract and emit the Principles of Deities to a great extent, thus charging the environment.
To attract maximum of Shri Guru’s Principle on Gurupurnima day, draw the rangoli shown on right side.
Source : Sanatan’s Holy Text ” Sattvik Rangolis “