What you’re looking at is the real-time geographic tracking information of flight ZA236 as it was coming back to its home base in Washington state. It flew across the entire United States, drawing this gigantic Boeing logo.
The Boeing 787 Dreamliner was going under an airframe pairing test using the the General Electric GEnx-1B engine. It drew the “787” and the Boeing’s logo from Washington State to Iowa. [Flight Global]