fx_Blink()

Produces a blinking effect.

Syntax:
     fx_Blink( <cBaseAttr>, <cSecondAttr>, [<lSoftBlink>] )   ->   NIL

Arguments:
     <cBaseAttr> is a character string containing an attribute symbol
     to blink FROM.  The attribute symbol must be one of the following
     color symbols supported by Clipper:

     "N", "B", "G", "BG", "R", "RB", "GR", "W", "N+", "B+", "G+", "BG+",
     "R+", "RB+", "GR+", or "W+".  (Case is not important.)

     <cSecondAttr> is also a character string containing an attribute
     symbol to blink TO.  The attribute symbol must also be one of the
     color symbols supported by Clipper.

     <lSoftBlink> is a logical TRUE or FALSE (.T./.F.).  When TRUE, the
     blinking effect is "softened" by fading <cSecondAttr>.  The default
     value is FALSE.

Returns:
     Always returns a NIL value.

Description:
     fx_Blink() produces a blinking effect by alternating <cBaseAttr>
     and <cSecondAttr> repeatedly thus creating an on/off effect.  If an
     undefined attribute symbol is specified or an error occurs, the
     effect will not occur.  Usually <cBaseAttr> is a foreground
     attribute and <cSecondAttr> is a background attribute, but this
     does not have to be the case.

Examples:
     // Blinks attribute "r" to attribute "g".
     fx_Blink( "r", "g" )

     // Blinks attribute "w" to attribute "n" with a softened effect.
     fx_Blink( "w", "n", .T. )