The lamp is the Sun. Drag the Earth to spin it and watch who gets daytime and who gets night-time. Then switch to Around the Sun to watch the Earth travel through the year, leaning toward the Sun and away from it.
Not to scale: the real Sun is 109 times wider than the Earth, and much further away. Not real speed: the Earth really spins 365 times on each trip around the Sun. We slowed the spinning down so you can see it.