Here is the shishyapiece mOhanaji's modified sonapattern, with a center design connecting the sona. Drawn using rangoli powder on my computer table.
Dot counts
15 - 3 lines
13 - 3 lines (leaving 1 dot on each side)
9 - 3 lines (leaving 2 dots on each side)
3 - line (leaving 3 dots on each side)
repeat from 13 dots on other side.
....and the masterpiece here, http://www.ikolam.com/node/15616?p=1930