Click on the green flag to reset everything. Then follow the instructions to see how a virus/rumour can spread through a population. When you graph the results at the end the bars show the percentage of the population infected at 10 second intervals. When I click begin sometimes not all of the sprites start moving, I don't know if that is a problem of the large number of sprites and would be grateful if anyone had any suggestions for this. I find I have to hold the mouse down on the button a bit I also find this works much better when downloaded.
