How to made pookkalam .. and fact behind this by each day

As i am. North indain not much aware about pookkalam but as we have seen the video attached with contest i am trilled to know the value of each day pookkalam and the using for flower each day ... Aslo happy to know that lord shiva is situated between this pookkalam to recieve god mahabali ... Fact behind this is so touchy and i can understand how to made pookkalam so created floor with cow dung paste and soil and made each day pookkalam as u all were making ...