Requires the same hardware (essentially) as the MatrixClock project, ie. an imp001 and four 8x8 LED matrices connected by I2C.
See the page linked above for wiring and parts info.
You’ll need to visit Electric Imp to sign up for a free developer account. You will be asked to confirm your email address.
Visit Electric Imp’s Getting Started Guide to learn how to configure your imp001 to access your local WiFi network, and how to enter code into impCentral and run it on your device.