This image was created by manipulating the properties of the different spheres, 
including their diffuse, specular, "shininess", and transmissive qualities.  
The flower has only specified diffuse and ambient coefficients.  
The back wall also has reflective qualities (has diffuse, specular, 
and shiny coefficients defined) in order to get the full reflective effects.  
Two point lights and one directional light were used to light the scene.