Northern and Neon lights. How do they change colors?

The northern lights are a very cool thing to see if you get the chance to. The northern lights are made up of shafts or curtains of colored light visible on occasion in the night sky. The picture above is the northern lights in Aurora. The neon lights also have a similarity with the northern lights from my opinion because as you can see from the images above the Northern lights can switch colors off and on just like how bright neon lights can. Neon lights glow by using a modest electric voltage with electrodes at the end of a glass tube containing the inert gas then the light begins to glow with all the electricity combining together. Neon lights fit their name very well because they are made up of the gas neon, which is what makes up most of the energy for it to give off it's asstonishing glow and light. As you can see above on the right is the neon lights that have the really cool color that they give off and on the left is a picture of the northern lights. The northern lights come in a variety of colors and the hot pink is only one out of maybe 100 or even more. You would have to be out at the right place and the right time to be able to see the northern lights because they come out in the night sky very occasionally.