Negative numbers give unpredictable results. Generally speaking, most of the values you enter will be between one and 50. In some cases, values up to 1000 could prove interesting. You are encouraged to try any values you like as well as mix the major and minor axis values. Pressing the return key without entering a value will return the main menu.
F ollowing the descriptive screen, the main menu comes next.
Simply press the letter or number corresponding to the program you want to run. As the screen with the descriptive text will indicate, most of the values you enter will be between 1 and 50. For some of the programs, such the probability curve, the useful values you enter will be small, for example, ranging from 1 to 6. For the cycloid, try values of 5 and 2 or 15 and 3 for the major and minor axis values respectively. When running the epicycloid, try values for the major axis that are multiples of the minor axis, such as 24 and 6.