How to fill out columns with specific number patterns

Hi!

I would need to add two new columns to my dataset:

Column 1: Have the same value for three rows then add +1, e.g:

n

n

n

n+1

n+1

n+1

Column 2: Add numbers from 1 to 3 constantly to rows, e.g.

1

2

3

1

2

3

Below is a picture of what i’m trying to achieve. I guess column expressions could do the job, but I haven’t figured this it out and any help would be much appreciated!

Thanks,

Ilkka