Rangoli is the art of decorating the floor. Rangoli is put in the dawn in front of the house and also in the pooja rooms. Its considered to be very auspicious. In south India its known as Kolam, drawn using white rice flour, but in many parts of the country is drawn with sandstone or limestone powder.
The picture above shows a typical sanskar bharathi rangoli. It was drawn by my sister on the diwali day last year. This rangoli is drawn without dots, its like a free hand drawing. To draw this you have to make use of all your five fingers.