Malfoy and Harry on the Hogwarts Express

In Harry Potter and the Half blood prince, Harry uses Peruvian instant Darkness Powder as a diversion to sneak into Draco's train compartment in order to listen in to his conversation. This MOC depicts that scene and is as screen accurate as I could make it. I tried to put the Invisibility Cloak on Harry, but Bricklink Studios 2.0 would not let me. If you know how to do this, please let me know. Bye!