E2M7: Spawning Vats is the seventh map of The Shores of Hell in Doom. E2M7 was the first level started for Doom, and early versions appear as E1M1 of Doom 0.4 and E1M11 of Doom 0.5. It was designed by Tom Hall and Sandy Petersen and it uses the music track "Waltz of the Demons." The par time is 4:00. As the last of the levels representing man-made complexes, Spawning Vats is in effect an amalgamation of all previous bases, including a container warehouse and a computer complex.