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Accompanied by a squadron of spacecraft, they fire weapons at the city and destroy key buildings, leading to mass panic.At the end of the film, the robots fuse together to form a giant sphere, which then detonates and engulfs the city in a fireball.In addition to writing, editing and directing the film, Álvarez created the visual effects based on computer-generated imagery.[7] Following widespread media coverage, Álvarez was offered a 30-million-dollar Hollywood deal to develop and direct a full-length film.After being uploaded to YouTube, the film's reputation spread by word of mouth, and received a boost when it was linked from the blog of Kanye West.