diff --git a/ShoulderCase/@Timer/Timer.m b/ShoulderCase/@Timer/Timer.m
new file mode 100644
index 0000000..d968930
--- /dev/null
+++ b/ShoulderCase/@Timer/Timer.m
@@ -0,0 +1,61 @@
+classdef Timer < handle
+
+  properties (Constant, Hidden = true)
+    data = TimerData;
+  end
+
+
+
+  methods (Static)
+
+    function output = start
+      Timer.data.addStartTime(datetime('now'));
+      output = Timer.data.getLastTimerID;
+    end
+
+    function output = stop(varargin)
+      if (nargin == 0)
+        output = Timer.stopLastTimer;
+      elseif Timer.exists(varargin{1})
+        output = Timer.stopSpecificTimer(varargin{1});
+      end
+    end
+
+    function clearAll
+      Timer.data.clearAll;
+    end
+
+  end
+
+
+  methods (Static, Hidden = true)
+
+    function output = stopLastTimer
+      timerID = Timer.data.getLastTimerID;
+      output = Timer.stopSpecificTimer(timerID);
+    end
+
+    function output = stopSpecificTimer(timerID)
+      if not(Timer.exists(timerID))
+        output = false;
+        return
+      end
+      startTime = Timer.data.getStartTime(timerID);
+      Timer.data.removeStartTime(timerID);
+      output = Timer.getElapsedTime(datetime('now')-startTime);
+    end
+
+    function output = exists(timerID)
+      output = Timer.data.timerExists(timerID);
+    end
+
+    function output = getElapsedTime(duration)
+      elapsedTime = char(duration);
+      output = [elapsedTime(1:2) ' hours ' elapsedTime(4:5) ' minutes ' elapsedTime(7:8) ' seconds'];
+    end
+
+  end
+
+
+
+end
diff --git a/ShoulderCase/@TimerData/TimerData.m b/ShoulderCase/@TimerData/TimerData.m
new file mode 100644
index 0000000..b319a25
--- /dev/null
+++ b/ShoulderCase/@TimerData/TimerData.m
@@ -0,0 +1,48 @@
+classdef TimerData < handle
+
+  properties (Access = ?Timer)
+    startTimes
+  end
+
+  methods (Access = ?Timer)
+
+    function obj = TimerData
+      obj.startTimes = containers.Map;
+    end
+
+    function addStartTime(obj,time)
+      timerID = num2str(obj.startTimes.Count+1);
+      obj.startTimes(timerID) = time;
+    end
+
+    function removeStartTime(obj,timerID)
+      obj.startTimes.remove(timerID);
+    end
+
+    function output = getLastTimerID(obj)
+      output = [];
+      timerIDs = obj.startTimes.keys;
+      if not(isempty(timerIDs))
+        output = timerIDs{end};
+      end
+    end
+
+    function output = getStartTime(obj,timerID)
+      output = obj.startTimes(timerID);
+    end
+
+    function clearAll(obj)
+      timers = obj.startTimes.keys;
+      for i = 1:length(timers)
+        obj.startTimes.remove(timers{i});
+      end
+    end
+
+    function output = timerExists(obj,timerID)
+      output = obj.startTimes.isKey(timerID);
+    end
+
+  end
+
+
+end