// Import the data
electrondensity = Import("watermolecule");
   // Partition the data
electrondensity = Partition(electrondensity);
   // Create an isosurface at a value of 0.3
isosurface = Isosurface(electrondensity,0.3);
   // Create a camera for the data
camera = AutoCamera(isosurface);

   // Create a macro. The macro takes as input a light, and collects the
   // light with the isosurface.  The collection is displayed using the
   // camera
macro makepicture(light)
{
  collected = Collect(isosurface, distantlight);
  Display(collected,camera);
}


    // Create a light in the direction [1 1 1]
lightdirection = [1 1 1];
    // Give it the color white
lightcolor = [1 1 1];
    // Make the light
distantlight = Light(lightdirection, lightcolor);
    // Call the macro
makepicture(distantlight);

    // Change the color to green
lightcolor = [0 1 0];
distantlight = Light(lightdirection, lightcolor);
makepicture(distantlight);

    // Change the direction to straight out in the z direction
lightdirection = [0 0 1];
    // The color is red 
lightcolor = [1 0 0];
distantlight = Light(lightdirection, lightcolor);
makepicture(distantlight);