Diffusion project using scratch. Press flag to add air molecules. Press space to add smoke molecules and watch them diffuse! Press left/right arrow to increase/decrease temperature NOTE: You need to press flag again to see change in temp. The red smoke molecules will not go into the cell, but the air molecules will. (Well, it's a little glitchy, so sometimes the smoke molecules will go in the cell, but that's not how it's supposed to happen in real life.)
Only like and fave if you really think that you cannot do better than this. This is an ok project, but it doesn't look nice or anything.