serie of serie

Hi,

I would like to generate a serie of serie and didn’t find how.  With generate_series. I can generate a serie

1

1

1

2

2

2

3

3

3

But how can I repeat this serie several times ?

1

1

1

2

2

2

3

3

3

1

1

1

2

2

2

3

3

3

1

1

1

2

2

2

3

3

3

Thanks for any help,