Liquid Shard is a 2016 art installation by Patrick Shearn of Poetic Kinetics.
 The installation was on display in Pershing Square in Los Angeles, California from July 28 through August 11, 2016.
 Shearn came up with the idea after being approached by the Los Angeles Recreation and Parks Department and Now Art LA with the proposal to create an art installation for Pershing Square.
Psycho is a 1960 American psychological horror film directed and produced by Alfred Hitchcock, and written by Joseph Stefano, starring Anthony Perkins, Janet Leigh, John Gavin, Vera Miles and Martin Balsam, and was based on the 1959 novel of the same name by Robert Bloch.
 The film centers on the encounter between a secretary, Marion Crane (Leigh), who ends up at a secluded motel after stealing money from her employer, and the motel's disturbed owner-manager, Norman Bates (Perkins), and its aftermath.
24 Hour Mountain Bike Races are a form of Endurance mountain bike racing where solo competitors or teams race for a period of 24 hours.
 The 24 Hours of Canaan (July 13–14, 1992) is accepted as the first sanctioned 24 hour mountain bike event 24 Hour of Canaan - History.
 At the 24 Hours of Indiglo (later renamed 24 Hours of Adrenalin) 17-year-old Ed Hunt became the first solo competitor at a 24-hour mountain bike event 24 Hours of Adrenalin Hall of Fame.
Passage is an outdoor 2014 art installation consisting of 38 weathered steel boat sculptures by Bill Will, installed along the MAX Orange Line in the Brooklyn neighborhood of southeast Portland, Oregon, in the United States.
24 Hour Fitness is the world's largest (by memberships) privately owned and operated fitness center chain, and third in number of clubs behind Gold's Gym and Fitness First of the UK.
 It currently has 400+ clubs, 18,000 employees in the United States, and an undisclosed number of employees working in a customer services call-center in the Philippines and another call center in Spokane, Washington.
 24 Hour Fitness also employs a collections contracting company located in Jamaica.
 The corporate office is located in San Ramon, California and a processing center is located in Carlsbad, California.
 The founder is Mark S. Mastrov, and the CEO is Chris Roussos.
 24 Hour Fitness is currently owned by AEA Investors, a leader in the private equity industry; Ontario Teachers’ Pension Plan, Canada's largest single-profession pension plan – and one of the world’s largest; and Fitness Capital Partners, a fund organized by Dean Bradley Osborne and Global Leisure Partners.
 It was acquired from the Company from Forstmann Little & Co in May 2014.
 24 Hour Fitness operates a nutritional supplement company, Apex Fitness Group, which is also the distributor of the Bodybugg system.
 Their motto is "Improving lives through fitness."
Sound installation (related to sound art and sound sculpture) is an intermedia and time based art form.
 It is an expansion of an art installation in the sense that it includes the sound element and therefore the time element.
 The main difference with a sound sculpture is that a sound installation has a three-dimensional space and the axes with which the different sound objects are being organized are not exclusively internal to the work, but also external.
 A work of art is an installation only if it makes a dialog with the surrounding space.
 A sound installation is usually a site-specific but sometimes it can be readapted to other spaces.
 It can be made either in close or open spaces, and context is fundamental to determine how a sound installation will be aesthetically perceived.
Walking With Our Sisters is a commemorative art installation of over 1,763 moccasin vamps.
 This art installation was created to remember and honor missing and murdered Indigenous women and girls.
 Each pair of moccasin vamps, also known as tops, represents one missing or murdered Indigenous woman from North America.
Festival Lanterns is an outdoor 2006 art installation consisting of granite and steel sculptures by American artist Brian Goldbloom, installed in northwest Portland, Oregon, in the United States.
 The work is administered by the Regional Arts & Culture Council.
Keret House is a structure and art installation in Warsaw, Poland.
 It was designed by the architect Jakub Szczęsny through the architecture firm Centrala, and has been described as the narrowest house in the world, measuring 92 cm at its thinnest point and 152 cm at its widest.
 The two-story art installation was named after Israeli writer and filmmaker Etgar Keret, who was the building's first tenant.
 Keret plans to give the house to a colleague after he moves out.
24 Hour Psycho is the title of an art installation created by artist Douglas Gordon in 1993.
 The work consists entirely of an appropriation of Alfred Hitchcock's 1960 "Psycho" slowed down to approximately two frames a second, rather than the usual 24.
 As a result, it lasts for exactly 24 hours, rather than the original 109 minutes.
 The film was an important work in Gordon's early career, and is said to introduce themes common to his work, such as "recognition and repetition, time and memory, complicity and duplicity, authorship and authenticity, darkness and light."

Question: 24 Hour Psycho is the title of an art installation consisting entirely of an appropriation of a movie written by who ?
Answer: Joseph Stefano