Click and drag the pendulum, and then release and watch it swing. Or click the green flag to set it to a random angle. Adjust the friction with the slider. What happens if ... ... you set friction to 0? ... you set the the pendulum pointing straight up, and then release it? Click the arrow buttons to change costumes. I might add more costumes later.
The dangling fellas are from the Scratch library. Thanks to @ffred for pointing out a bug, and @colinmacc for instantly finding the problem and solution!