I have always been fascinated and intrigued by the drawings one finds on streets and pavements, even in homes . Some with graphic designs, geometric patterns, stars, flowers, triangles etc. They are done with chalk, paint, powder and whatever . They are commonly seen at high holidays like at Taipusam or Timithee. Is there a name for this "street art"? Are there particular designs used for particular reasons. Ive seen fresh flowers offered on top of the drawings. Is there a book I could read to learn more about this? Appreciate any information supplied .