Storyboards implementation.

osu.Game/Storyboards/CommandLoop.cs

@@ -0,0 +1,27 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+
+namespace osu.Game.Storyboards
+{
+    public class CommandLoop : CommandTimelineGroup
+    {
+        private double startTime;
+        private int loopCount;
+
+        public CommandLoop(double startTime, int loopCount)
+        {
+            this.startTime = startTime;
+            this.loopCount = loopCount;
+        }
+
+        public override void ApplyTransforms(Drawable drawable)
+        {
+            //base.ApplyTransforms(drawable);
+        }
+
+        public override string ToString()
+            => $"{startTime} x{loopCount}";
+    }
+}