The first kolam is Aiswarya kolam or Iswarya kolam .  The image above shows the step by step procedure to draw the kolam.  The dot pattern is 7 dots at the centre, 8,7,6,3 on either side.   Idhaya kolam or thamarai kolam is drawn as shown in the image above.  Place five dots in eight directions. The first set of lines is shown on the top left of the image.   These kolams are drawn on Fridays in Pujai room only.  They can also be drawn for Tulasi maadam.   Decorate with kaavi 

This kolam is a bit tricky , hence I have added more images.  Observe the images carefully, particularly for connecting the lines on four sides of the square.  Add neli lines ( neli literally means wriggle,  they are twisted lines usually drawn in pairs particularly for traditional rangoli ).  Add lamp designs on four sides of the kolam , place deepams .  Decorate with kavi . A simple n beautiful rangoli using lines 

A small n simple free hand rangoli for Karthigai Deepam festival decoration.  For a change a kolam  without dots and with colours too.  Of course , deepam or lamp is the theme . What Diwali is for many parts of India ,  Karthigai Deepam is for Tamil Nadu.  It is also a festival of lights. I added this simple rangoli with deepam design.  The dot grid used is six to one dots Rangoli tip:  Dots can be used for decorating kolams , the smaller they are the more beautiful the kolam is  

The dot pattern is 9 by 5.  Connect the dots with lines as shown in the second picture.  Add diya or deepam patterns .  Add kavi or colours .  Place diyas around the kolam  

The dot pattern is 7 by 4  Use 7 by 4 dots , draw the lines connecting the dots, draw lines between .  Add patterns in and around the kolam.  I have used lotuses.  We can use lamp designs also for Karthigai Deepam festival  

Place 3 dots in eight directions.  Draw three lines of decreasing length as shown.  We can draw a bigger version of the kolam also.  The step by step images are self explanatory.  Draw diya or lamp patterns because like Diwali Karthigai Deepam is also a festival of  lights