And many of you have been using it to stunning effect, but saying thank you to our NHS heroes and keyworkers with artistic murals.
Thank you to everyone who has sent us their so far, and please keep them coming, we will make another gallery soon!
5. Peter Finch sent us this picture of his NHS poster
Peter Finch sent us this picture of his NHS poster Photo: BH
6. A big thank you to keyworkers spotted by a reader on Meadowcroft
A big thank you to keyworkers spotted by a reader on Meadowcroft Photo: BH
7. This Halton home says thank you to the NHS
This Halton home says thank you to the NHS Photo: BH
8. Chalk has become a popular medium for showing support
This design spotted on the Quarrendon estate Photo: BH