Footage from a live flight tracker showed a sky-drawing Thursday of the outline of a Boeing 787 Dreamliner in the air above the U.S.

The plane travelled nearly 6,500 kilometers (4000 miles), spending 17 hours to leave the giant sketch on radar.

The unusual flight turned out to be a complicated promotion move from the world's largest aerospace company Boeing.

The Dreamliner took off from the Boeing headquarters in Seattle at 3:38 p.m. local time Wednesday and was expected to be back at 9:25 a.m. the next day.

During its artistic path, flight BOE004 entered the airspace of 20 different U.S. states.

The twin-engine Dreamliner is a long-haul, mid-size wide body airliner, which can seat up to 335 passengers.