Still working on some VN elements, it's coming together slowly.

include/dawn/display/animation/easing.h

@@ -15,6 +15,16 @@
  */
 #define easeTimeToEase(start, current, duration) ((current-start)/duration)
 
+/**
+ * Animation tool for converting 0-1 space into a 0-0.5 back to zero space. This
+ * is intended to make a "Forward then backwards" effect for animation. This 
+ * method will not scale t.
+ * @param t Time in space to back and fourth on between 0 and 1.
+ * @returns Forward and backwards time. 0 to 0.5 are as such, 0.5 to 1 are from
+ * 0.5 to 0.
+ */
+#define easeTimeToForwardAndBackward(t) (t < 0.5 ? t : 1 - t)
+
 // Easing Functions, most were sourced from https://gist.github.com/gre/1650294
 #define easeLinear(t) t