Just press the flag and click stuff. (There is no cat intro thingie since this is supposed to be an interactive card thingie for christmas, and also because I'm too lazy to code anything else onto here). (I know that it's now way past Christmas, but I'm going to leave this up because it's a fun little thing, and it doesn't HAVE to be Christmas to enjoy Christmas themed things, just it seems a little out of place but whatever.)
Thank you to hour of code for the instructions. Thank you to EVERYONE who has used the things that follow your mouse, it gave me the idea for the falling snow and berries. Also, thank you SO much to........ Scratch!!!! For the ability to do all of this!