In his code after "and now we apply flow fields and try to move these points", the code is errant. It will produce errors if you try to run it. The variable "m

In his code after "and now we apply flow fields and try to move these points", the code is errant. It will produce errors if you try to run it. The variable "m" in draw() should be changed to "points". The variable "h" in draw() should be changed to "t".