This is a rectangular pattern using the Harlequin stitch which I learned from the Daisy Farm Crafts article on this stitch.

https://daisyfarmcrafts.com/crochet-harlequin-stitch/

If you do not know how to make this stich then be sure to go to their website and follow the video tutorial. It will make this pattern so much easier.

I used Yarn and Colors 100% cotton yarn in Lilac and Premier Yarns Home cotton in Blueberry Speckle. 1 skein of each. The Blueberry Speckle is only used on one row, so you do not need much.
Both yarns are very soft and easy to work with. I highly recommend you use a cotton yarn as you will want to wash it and cotton is very durable.

Stitch Notes: stitches in parentheses are to be completed all in the same stitch ()

Stiches used:
ch - chain
st - stitch
sts - stitches
dc - double crochet
sc - single crochet
hdc - half double crochet
dc3tog - double crochet 3 together
dc6tog - double crochet 6 together
sk - skip stitch
sl - slip stitch

Hook size - 3.5 mm
Pattern is a 8+1 repeat

Base row - ch 41

Row 1 - Using the Lilac yarn , in the 5th chain from the hook complete (3dc, 1ch,3dc). Skip 3 sts, 1 sc in the next st. * skip 3 sts, (3dc,1ch, 3dc) in the next st, skip 3 sts, 1 sc in the next st* Repeat from to to the end of the row. chain 3 and turn.

Row 2 - Skip 1st st, dc3tog in the next 3 sts, ch 7, sk 1 st, dc6tog in the next 6 st, skip the sc from the previous row in the middle of your 6 sts, repeat from * to * until you get to the last 4 remaining sts, dc3tog, 1dc in the top of the previous rows last st. ch 3 and turn.

Row 3 - dc in the first top of the first dc3tog from the previous row below. * 1sc in the ch1 st in the row below, 3dc, 1ch, 3dc in the top of the dc6tog* repeat from * to * until you get to the top of the last dc3tog, 3dc in the top of this st, 1dc in the top of the turning ch.

change color back to the Lilac, do not change colors again after this. the remaining rows are all completed in Lilac.

Row 4 - 8 repeat rows 2 &3.

Row 9 - 1sc in the 1st st, 1hdc in the next, 1dc in the next 2 sts repeat from * to * to the end of the row.

Border is 1hdc in each stitch starting from the corner where you ended row 9. When you get all the way around the rectangle, crochet 10sts and sl to the begining hdc. to create your loop for hanging. (optional)

Hope you have a joy-filled crochet day!