The first one above is with dots pattern 19 by 9 dots, 11 by 1 on either side and 9 to 4 on either side.The method to draw this through some photos of intermediate designs is available in birds kolam with dots. Draw the floral patterns at the centre and the outside. Then add the birds facing each other with fruits in their beaks. Fill the kolam and the background with colours to get a beautiful and big kolam for the season. This is also a common design.
This design represents the claws of a crab - in fact it appears as if six crabs are there. This is quite a common kolam design. Since the dot pattern is 21 to 11 it takes quite some time to complete it. This pattern with colours and the relevant video showing I drew it is available in New year rangoli
However as in the case of the previous rangoli, in this case too, two intermediate steps of this big rangoli is shown in the photos below. To state the obvious, in the first case the six patterns on the corner and the one at the centre are drawn. Then the lines are connected around or along these patterns using the dots around to get the stage in the second photo. The third photo shows the completed design but without colours.
Obviously, the completed rangoli is another common big kolam. Again to complete it with colours, patience is required. If the background is also to be filled one will need 15 minutes extra. The entire kolam design with colours and the background also in colour is available in Margazhi season and rangoli.
The elephant-rangoli designs is a rangoli with 21 to 1 dots. The video is on my YouTube channel. Two intermediate steps are shown below. The right one with only the elephants and canopied seat (called howdah or ambari ). The gaps between two elephants is filled with a four petal floral design and the tusk as shown in image at the top. That leaves only the dots at the centre. I have filled it with a common floral petal design which with colours filled is available in simple floral patterns. ( Simple rangoli designs can be used independently as a rangoli or as a part of a bigger rangoli ). The first stage shows only the four elephants drawn on four sides with the canopied seat and caparison ( a decorative cloth on the back ) . In the second stage I have added the tusk(s) and floral patterns between the elephants.
There are colourful rangoli design, more flower rangoli designs in Rangoli-patterns-sans-dots
For rangoli with dots there are pulli kolam designs