Use the height, angle and force sliders to adjust the launch parameters. Then press the aToss button. The reset button clears the traces made by the horse from the screen.
The printOn button toggles the data display window. It is in the on position to start. The cleartext button clears the data display window.
The hook slider selects one of three display routines. Hook 1 draws a smooth curve as the horse falls. Hook 2 and 3 display the movement in descreet x and y steps. Hook 2 displays x then y, hook 3 displays y then x.
Oh and by the way, watch out for that tree!