In filmmaking, a wipe is a type of film transition where one shot replaces another by travelling from one side of the frame to another or with a special shape. If the wipe proceeds from two opposite edges of the screen toward the center or vice versa, it is known as a barn door wipe (named for its similarity to a pair of doors opening or closing). The following are some specific styles of wipes: An iris slow is a wipe that takes the shape of a growing or shrinking circle. It has been frequently used in animated short films, such as those in the Looney Tunes and Merrie Melodies cartoon series, to signify the end of a story. When used in this manner, the iris wipe may be centered on a certain focal point and may be used as a device for a "parting shot" joke, a fourth wall-breaching wink by a character, or other purposes. Optional graphic (i.e. rips) occasionally overlay it to achieve a certain effect like an iris tearing transition. A star wipe is a wipe that takes the shape of a growing or shrinking star and is used to impart a sense of "extra specialness" or "added value". An example of the "star wipe" can be seen in the Guiding Light opening sequences of the 1980s. This convention was considered overused during that time period and is now generally thought to be somewhat out-of-date. The use was parodied in Aqua Teen Hunger Force Colon Movie Film for Theaters and The Simpsons. A heart wipe is a wipe that takes the shape of a growing or shrinking heart, and is used to impart a sense of "love" or "friendship". The heart wipe is still used in wedding, graduation, and bar mitzvah videos, among others, as it has now passed from stylistic into the realm of standard convention, though many people consider it tacky. A matrix wipe is a patterned transition between two images. The matrix wipe can be various patterns such as a grid, stars, etc. A clock wipe is a wipe that sweeps a radius around the center point of the frame to reveal the subsequent shot, like the sweeping hands of an analog clock. Because of this similarity, it is often used to indicate that time has passed between the previous shot and the next shot. One of the TV shows that used the