create a unique, smooth-flowing dance. Some callers are also known for the unusual and interesting formations they move the dancers through. Singing calls Singing calls are based on a sung delivery of calls, most often to a recognizable melody, and square dance calls are mixed in with the song's original lyrics. Many widely recognized songs have been turned into singing calls. The primary purpose of singing calls is to help the dancers relax, dance well together as a group, and enjoy the song and the caller's performance. Some callers are very well known for their voices, and for how well they can perform singing calls. There is often a very specific format for singing calls. Most singing calls are structured in an A-B-B-A-B-B-A format, with each section consisting of 64 beats. The "A" sections (the beginning, middle and end "break" sections) often involve simple moves done in a circular fashion, with no partner change. The "B" sections, known as the "figures", are often, especially at the lower levels of dancing, identical, and produce a partner change. Usually this means that at the end of each "B" section each "lady" moves to the next "gent" to her right. At the end of the final B section, each "lady" has returned to her original partner. Variations are occasionally seen; for example, the ladies may move left instead of right, or the last "A" section may be omitted. Singing calls, like patter calls, vary in dance difficulty, and are rarely improvised in full. They are uncommon above the Advanced program, although there are famous singing calls at the highest challenge levels. Programming A modern Western square dance tip is composed of a combination of patter calls and singing calls. Usually one patter call is followed by one singing call to make a tip, although this is not universal. There are a number of ways that a caller programs the evening's entertainment. The caller might feature a particular music theme (such as a Rock and Roll party, or a Halloween festival), or might include variations of a particular dance call throughout the night. Generally callers start the evening slowly to warm dancers up, and to give them chances to succeed during the first tip. Then tempo and difficulty increases and peaks for most of the evenings. At the end of the evening there is usually a slower dance number at the end to relax