GridLight: Hello World is an activity built to support the Hour of Code initiative

Pro tip: Play on your desktop Chrome browser and full screen the game window for the best experience

Hosting an Hour of Code this December? Check out our GridLight: Hello World Game Guide for tips on getting set up, an overview of the story, what coding concepts are covered, and more.


Print out a certificate with Root and your Bot Friend Nab!

There are spots to write in the player’s name and to jot how many Light Sprites, Null and Bugged Bots, and Light Bits were collected.

Click on an image to download a certificate of your Nab, or hit “Download All Certificates” to get a PDF with all four certificates.

The 'Hour of Code' is a nationwide initiative by Computer Science Education Week and to introduce millions of students to one hour of computer science and computer programming.