Create TODO_Animation.md

TODO_Animation.md

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+# Animation (continuation)
+
+### Goal
+- Implement Animation in GacUI XMl Resource
+- Possible to provide state machine XML tags
+
+### Script
+
+```
+
+class MyProperties
+{
+    prop A : int {}
+    prop B : int {}
+}
+
+func CreatePropA() : MyProperties^ { ... }
+...
+
+func MyCalculation(dest: MyProperties^, a: MyProperties^, b: MyProperties^, ...): void { ... }
+
+$interface IMyAnimation : IGuiAnimation<MyProperties>; // prop CurrentState : MyProperties^ {}
+
+func MyAnimation() : IMyAnimation
+${
+    $Set CreatePropA(); // or use CurrentState
+    $Play CreatePropB(), 10 // gradually change to the specified state during 10 seconds
+    $Play CreatePropC(), 10, [$1*$1] // change the default linear interpolation 
+    for(i in range [1, 10])
+    {
+        $Play CreatePropB(), 10, MyCalculation // call a function to decide the interpolation
+    }
+}
+```