<!DOCTYPE html> <html> <head> <meta charset="UTF-8"/> <title>sequencer</title> </head> <style> #main { width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: -1; } #main .container { width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: 1;
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