click the green flag to start. if you want to play around a little - S to show a few variables H to hide. to change the how often (in seconds) by 0.1 press - right arrow key. to change be -0.1 - left arrow key. key X to set the x positions it will then ask you s for starting & e for ending if you type s it will say set starting position after you put your numbers it will set the starting position x to your numbers. same is is if you type e it will set the ending position. all this is same if you put in y for the first answer it (but instead of x it will do y.) if you click it will set the mouse variables to your mouse ( but will not change until you click again)
sorry for the long instructions. please love a favorite!