2017-07-26a Thinking about the impact I'd like to have #impact.png
2017-07-26a Thinking about the impact I'd like to have #impact.png

Sketches are (c) 2007-2020 Sacha Chua - Creative Commons Attribution License 4.0 unless otherwise specified. This means you can freely share and adapt the sketches (even commercially) if you include attribution (usually built into the sketch) and indicate the license and any changes.