box : M 20,20 L 20,40 L 40,40 L 40,20

half circle : M 200 0 c 0,70 95,70 100,0

https://www.w3schools.com/graphics/svg_path.asp

https://docs.google.com/spreadsheets/d/1eHbwZ4Nbuq8y0pxTsmrRag4DLvuVsETWnN1CXM_78qQ/edit#gid=0

https://css-tricks.com/snippets/svg/curved-text-along-path/

https://css-tricks.com/using-svg/