! Copyright (c) 2012 Anonymous
-! See http://factorcode.org/license.txt for BSD license.
+! See https://factorcode.org/license.txt for BSD license.
USING: accessors arrays calendar colors kernel math
math.constants math.functions math.rectangles math.vectors
IN: rosetta-code.animate-pendulum
-! http://rosettacode.org/wiki/Animate_a_pendulum
+! https://rosettacode.org/wiki/Animate_a_pendulum
! One good way of making an animation is by simulating a
! physical system and illustrating the variables in that system