Function animate_anaglyph

animate_anaglyph(
    duration: number,
    fps: number,
    func: RuneAnimation,
): AnimatedRune
Create an animation of anaglyph runes
Parameters
- duration: number
  Duration of the entire animation in seconds
- fps: number
  Duration of each frame in frames per seconds
- func: RuneAnimation
  Takes in the timestamp and returns a Rune to draw
Returns AnimatedRune
A rune animation