Sets the direction for brightness modulation to create a Metal color effect for the "current" Color Object.
  Usage: 
      PASS         <brightness_direction>     FIELD            SHARE? N
      GOSUB    0CD .COLOR SET METAL
      *        Check for error
      IF       0CD .COLOR SET METAL           NE
  Description: 
Sets the direction for brightness modulation to create a Metal color effect for the "current" Color Object.
<brightness_direction> is an integer from 0 - 360 and represents the the direction for brightness modulation, specified as a clockwise angle in degrees, with 0 being the upward pointing direction. Note that this does not change the color of the color object, only the brightness modulation.
See 
ColorSpec for more information on working with colors.
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-- 
JeanNeron - 2011-11-16