public void startCourse()
{
if (course == null)
{
buildCourse();
}
if (queue1.NotEmpty)
{
queue1.start();
}
else
{
StimulyEllipse1.Visibility = System.Windows.Visibility.Hidden;
}
if (checkPointTimer != null && built)
{
checkPointTimer.Start();
ShowNextCheckPoint(null, null);
}
}