Just type in the speed you want the pendulum to move. The red bar represents thermal, green bars represent potential, and blue is kinetic. Gravity=1 means that the pendulum goes on at the same speed forever. Keep it above 0.98 or so to be a more accurate pendulum but you can screw around with other gravity :P Press space to show speed and gravity. Press b to hide them. You can change the gravity via the gravity bar on the top left. You can also change the speed Via the speed bar on the top right :P WARNING: IF YOU ENTER THE SPEED AND GRAVITY VALUES TOO FAST, THE PROGRAM WILL GLITCH OUT AND SAY YOU DIDN'T FOLLOW INSTRUCTIONS!!!!!!!!