Here are some examples of rangolis to get you started on thinking about the form. The second example is a non-traditional approach to the grid rangoli...
Rangoli is an ancient Indian folk art form. It is made to decorate the front doorstep of an Indian home and welcome the guest in.
Step 1: Choosing a space
Make sure that the space you choose is not in the way of pedestarians; the best place is right next to the wall of your home. It is also important to choose a space that has a dark floor with an even texture so that the rangoli stands out and the lines are clean and sharp.