What are pins and how do I draw them?
Solution 1:
Pins are small circles that act as pivots or rotational points. To draw one, simply draw a very small circle. If you do it right, it will turn into a small, animated circle. You can then draw other objects (like hammers) which will rotate via gravity.
Attaching an object to two pins makes it completely unmovable, or as far I have seen.
Solution 2:
Pins are a small draw circle that when you put a form attached to it, it will rotate around the pin.