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  Description
 
    The NormVideo procedure sets TextAttr to the text attributes saved
    at program start-up. Use NormVideo to restore the original colors
    and attributes after calls to the HighVideo, LowVideo,
    TextBackground, and TextColor procedures.
 
    The Crt unit defines the variable TextAttr. TextAttr holds the
    current foreground color in bits 0-3, and the current background
    color in bits 4-6. Bit 3 controls intensity. Bit 7 enables or
    disables blinking. Crt defines the possible colors as constants
    that can be passed to TextColor and TextBackground.