relax and... solve one of these 3x4 puzzles. 
David Woodroffe, colour by numbers. 
Special famous pictures, others... Be careful, the pieces can also be rotated

The original photo of Vincent van Gogh's "self portrait" is in according with
https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project.jpg/960px-Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project.jpg

The original photo of Tutankhamun's "the Mask" is in according with

https://upload.wikimedia.org/wikipedia/commons/7/76/King_Tut_Mask_front_and_back.jpg

The original photo of vanGogh's "Sunflowers" is in according with
https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Vincent_Willem_van_Gogh_128.jpg/1023px-Vincent_Willem_van_Gogh_128.jpg

The original photo of Rodin's "le Penseur" is in according with

https://images.metmuseum.org/CRDImages/es/original/DP-13618-012.jpg?_gl=1*1g05njo*_gcl_au*MTE4NDY1ODc2Ni4xNzQ4MjY2NTY3*_ga*MTAyNjQwMTY2My4xNzQ4MjY2NTY4*_ga_Y0W8DGNBTB*czE3NDgzNTgxMjAkbzIkZzEkdDE3NDgzNTg1OTIkajAkbDAkaDA.

The original photo of Hals's "The Laughing Cavalier" is in according with

https://upload.wikimedia.org/wikipedia/commons/thumb/9/97/Cavalier_soldier_Hals-1624x.jpg/1024px-Cavalier_soldier_Hals-1624x.jpg

The original photo of Nefertiti is in according with

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Nofretete_Neues_Museum.jpg/960px-Nofretete_Neues_Museum.jpg

All these beautiful drawings are colored using the DW's method by someone from Galați România.