Missing ArrayList type in Chain class

[mrtnRivera]

Testing in an old Processing version (3.5.4). So take with a grain of salt.
Got a compilation error pointing to lines 16 and 17 on the Chain class file.
Adding the data type to the ArrayList allowed me to compile and test the example:

joints = new ArrayList<PVector>(); // Assumed to be >= 2, otherwise it wouldn't be much of a chain
angles = new ArrayList<Float>();

By the way, thanks for sharing the implementation to your wonderful explanation and video. Cheers