How to crochet a 3 D stitch

Hello my Lovelies,
it is time to show you this amazing 3 D stitch. Quite an easy stitch and I wonder how an afghan would look like with this stitch.

I used Schachenmayr Bravo Yarn in light blue with a G Hook.

The number of stitches must be divisible by 3!

Cast on 18 ch and 2 extra ch for your first turn.

Row 1: Work a DC on your third ch from hook, and in each ch across. Ch 3 and turn (18 DC)

Row 2: skip 1 stitch and work 3 DC in your next stitch

*ch 3, skip 2 stitches and work 3 DC in your next stitch*
repeat *to* till the end of your row.

DC in your last DC and Ch 3 and turn

Row 3: work 3 BpDC in to your first DC of your 3 DC Group of your previous row

*ch 3 and work 3 BpDC in you first DC of your next 3 DC Group*
repeat *to* till the end of your row

DC in your last turning chain of your previous row, Ch 3 and turn

Repeat Row 3 until you have reached your desired length

1st Last Row: work 1 sc in your 3rd DC of your 3 DC Group of your previous row

*ch 2, 1 sc in your 3rd DC of your next 3 DC Group of your previous row*
repeat *to* till the end of your row

and 1 sc in your last turning chain of our previous row, Ch 3 and turn

2nd Last Row: skip one stitch and work 1 DC in your sc of your previous row and 2 DC in your ch 2 space

repeat till the end of your row and fasten off (18 DC)