Press the right arrow key to advance. When you first open up the project, you can toggle the three sliders on the bottom. These are presets for the amount of heating time (seconds) and cooling time (days, although it is fast-forwarded in the project to seconds), as well as the amount of soap (measured in multiples of original amount). When the cooling and heating time is changed, the form or the color of the soap will change at the end, depending on the ratio of heating time to cooling time. A check mark will appear at steps 2 and 4 to tell you when your presets have been completed.
If the bar of soap does not appear when you first click the green flag, press the stop button and click the green flag again. Warning: this program may cause a lot of lag on your computer. Also, don't advance through the process too fast, or else glitches will happen. This was a project for my physics class.