Use the mouse to change the amount of light. The more light the leaf receives, the more oxygen it will produce and the more green the leaf will be. This is a very simple simulation, you will also need water and carbon dioxide to produce oxygen. To learn more, watch this simple video: https://www.youtube.com/watch?v=D1Ymc311XS8 Have fun! Miauw =^..^=
song: La Thune by Angèle (instrumental)