Spiral4 adds a new library, Utility. This class of libraries is a toolkit for many tasks, in this case we are it to pause the code for a three tenths of second to keep the motors rotating. Without this pause the code would keep changing the variable but there would be very little time for the robot to move. We also created two variables, speedB and speedC, then we use this to keep increasing the speed of the of wheels with in the repeat loop.