Th telugu word for rangOli or kOlam is muggu. There is literary evidence for the decoration of households with muggu even in the 14th century. That is why I beg to disagree with a recent essay in American Scientit saying that these patterns originated in the 18th or the 19th century. Here is a pattern that is made of the word muggu ( ముగ్గు ). Enjoy!
Regards! - mOhana