function doSomeDecorating( bitmap, basecolor )

  // color setup
  light = Color( basecolor.red, basecolor.green, basecolor.blue )
  light.brightness = light.brightness + 0.2
  
  dark  = Color( basecolor.red, basecolor.green, basecolor.blue )
  dark.brightness = dark.brightness - 0.2
  
  // border
  bitmap.line( 0, 0, bitmap.width, 0, light, 4)
  bitmap.line( 0, 0, 0, bitmap.height, light, 4)
  bitmap.line( bitmap.width-1, 0, bitmap.width-1, bitmap.height, dark, 4 )
  bitmap.line( 0, bitmap.height-1, bitmap.width, bitmap.height-1, dark, 4 )
  
  // upper right corner
  bitmap.setpixel( bitmap.width-1, 0, basecolor )
  bitmap.setpixel( bitmap.width-2, 0, light )
  bitmap.setpixel( bitmap.width-2, 1, basecolor )
  
  // lower left corner
  bitmap.setpixel( 0, bitmap.height-1, basecolor )
  bitmap.setpixel( 0, bitmap.height-2, light )
  bitmap.setpixel( 1, bitmap.height-2, basecolor )

end