Okay, a color matrix... Kind of handy you'd like to think, but what does it do? :)

EvaluateSystemScript("time.js");

function ColorMatrixTest()
{
  var original_surface = GrabSurface(0, 0, GetScreenWidth(), GetScreenHeight());

  var grayify_matrix           = CreateColorMatrix(0, 85, 85, 85, 0, 85, 85, 85, 0, 85, 85, 85);
  var swap_red_and_blue_matrix = CreateColorMatrix(0, 0, 0, 255, 0, 0, 255, 0, 0, 255, 0, 0);

  var surfare = original_surface.clone();
  surfare.applyColorFX(0, 0, surf.width, surf.height, grayify_matrix);
  surfare.blit(0,0);
  FlipScreen();
  Delay(1000);

  surfare = original_surface.clone();
  surfare.applyColorFX(0, 0, surf.width, surf.height, swap_red_and_blue_matrix);
  surfare.blit(0,0);
  FlipScreen();
  Delay(1000);
}