I understand that rangavalli is the name given to rangoli in classical Telugu. Though names differ they are all essentially the same, beautiful and colourful designs drawn on the floor, daily and definitely during festival seasons like Diwali, Navratri and Sankranti (in Andhra Pradesh ) and Pongal in Tamil Nadu. The rose smells as sweet even if it is called by any other name. So also rangoli designs or rangavalli are all beautiful to see, to draw, to admire.
The first rangavalli above in a series of flower and diya designs for the festival season. Draw the central flower pattern first with eight petals. On the edge of each petals draw motifs of your choice and fill the motifs also with any further designs as shown. Fill the central flower with bright colours like pink and the outer designs with red and other colours as shown. The remaining gaps are filled with yellow. Make some simple decorations with white and red rangoli powder to get the final design. After completion the rangavalli will be very attractive.
The next rangavalli below is a diya design. First the central design is drawn and is then surrounded with four diyas on four sides. Fill the outline of designs with blue, green and pink colours. For the lamp use orange colour and white lines to give an enhanced effect.. Diya or lamp designs are used quite a lot for special occasions and festivals like Diwali. Rangavalli or rangoli drawn the traditional way only give a representative image of what we are trying to draw -birds, lamps, flowers.
The next rangavalli in the image above, is a free hand rangoli design. Actually it is an improvement of a rangoli design drawn elsewhere. The rangoli is a very simple floral design however filling up with the various colours takes some time. This rangoli has the patterns in white rangoli powder inside and on the border (with lines and dots ) added to get this image. In case you want to view this rangoli in the previous stage it is available in muggulu designs
For more free hand designs please go to Margazhi kolam designs or rangoli or mandala
For rangoli with dots pulli kolam designs, simple kolam with dots