Lights? Fireworks? Laser beams?

None of the above. This lovely image is made up of drones. South Korea's Ministry of Land Infrastructure and Transport used 300 drones in an unusual display to thank front line workers during the pandemic.

The 10-minute synchronized light show lit up the night sky above the Han River in Seoul on July 4. It featured images of medical workers in protective gear along with images of hand-washing, people wearing masks and people social distancing. To avoid crowds, the show was not announced beforehand.