Google and the National Park Foundation invite girls (and boys) to code holiday lights for the annual tree lighting ceremony.  They can go to madewithcode.com and use blockley, an introductory programming language, to code Christmas lights, a snowflake, or even a yeti.  If they choose to code lights, their work will be displayed on their state or territory’s tree throughout the month of December.   Made with Code is an initiative with resources to show girls the fun and creative things they can do with computer science.