This design is made with rice flour outside a Temple Entrance. The meaning behind this, being..a lot of ants and some insects may feed on this to avert hunger. Of course, and also as an auspicious sign :))\
When we are young, we are taught by our mothers or grandmothers to create these. We adorn even our homes with these. These are called Dot Kolams, as symmetrical dots are used to make these.