Update FMXBezierAnimation.md

Author: zhaoyipeng

Documents/FMXBezierAnimation.md

@@ -1,3 +1,12 @@
 ## [TFMXBezierAnimation](https://github.com/zhaoyipeng/FMXComponents/wiki/FMXBezierAnimation)
 
 ![FMXBezierAnimation](../SnapShots/FMXBezierAnimation.gif)  
+
+TFMXBezierAnimation component inherit from TFloatAnimation, you can just drop a TFMXBezierAnimation component same as TFloatAnimation.
+
+use these code to set the cubic-bezier parameters
+```pascal
+  BezierAnimation1.Duration := duration; 
+  BezierAnimation1.SetData(X1, Y1, X2, Y2);
+  BezierAnimation1.Start;
+```