(if you are overweight like me and are doing this design for yourself, then its not easy.)
for this design just following images you can get step by step idea of design.
1st at the center put a henna dot.
then draw a circle around it.
draw another circle around it.
then draw lines in between those circles.
again draw henna lines as shown (like we used to show rays of sun in childhood).
then draw "c" shaped zigzag like circle around it.
then simple circle around it and fill the gap in between with henna.
then put big dots around it.
add two dots on each toe.
make similar design on another foot.