Click the green flag to start. You may notice nothing is happening. Now you have to use your mouse to change the values in the sliders by sliding the dot up or down . You will now notice that the values in the other boxes are changing. Keep changing the values on the sliders. You can look at the stage script to see how each box is being calculated.
I made this demo by using the "Learn to Program with Scratch" book. I had to first download the file "Ch 5 SeriesCircuit No Code.sb2." Then I made one script for the stage using the book. I then used the book to locate where each slider belonged.
