53:13 · A sign for house occupiers, squatters. This is a modern ideogram used by members of a youth movement in Germanic countries who occupy evacuated houses. The Group is involved in continuous fighting with the police, the authorities, and the building constructors who are demolishing habitable houses in cities' central areas in order to earn money for their owners by awaiting the right time to build new high-rises on the lots. The movement is closely associated with the anarchist movement using the previous entry sign as their symbol.
    In physics this sign is a symbol for static free system.