Running TestNG tests again and again programmatically

I have two test cases TC1 and TC2 and trying to execute these two test cases three times in following manner: TC1 TC2 TC1 TC2 TC1 TC2

i tried with following code using @factory:

public class ClassName {@Test(priority = 1,invocationCount = 1)
// TC1
public void verifyQuestionTitle(){
    try {
        .....
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
}

@Test(priority = 2,invocationCount = 1)
// TC2
public void verifyAnswerOptionsCount(){
    try {
        .....
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
}

@Factory
public Object[] create(){
    return new Object[]{
            new ClassName (), new ClassName (), new ClassName ()
    };
}

But this result in execution of TC1 three times first and then TC2 three times i.e. TC1 TC1 TC1 TC2 TC2 TC2 which is different than i desire. using the invocation count to 3 also result in same pattern. Can anyone help me achieving what i am looking for.