Selection Sort Algorithm Animation: Pausing

public int minimumPosition(int from)
      throws InterruptedException
{
   int minPos = from;
   for (int i = from + 1; i < a.length; i++)
   {
      sortStateLock.lock();
      try
      {
         if (a[i] < a[minPos]) minPos = i;
            markedPosition = i;
      }
      finally
      {
         sortStateLock.unlock();
      }
      pause(2); // two array elements were inspected
   }
   return minPos;
}