The snowy christmas night consists of several layers.

• snow_grown_layer - classes ranging from 1 to 5, and serves as snow at the bottom of the page
• snow - is the class of canvas element in which snowballs are generated and in the javascript you can modify the intensity and the speed of snow
• moon - is a class for a month
• tree_back - is an element in which a whole tree is found, and there are other elements of the tree such as star, tree top, tree base, tree middle, footer, led.

If you want me to describe this in more details, just write in the comment.