While it looks challenging, it is simply a Corner to Corner (C2C) pattern made with Half-Double Crochet Stitch (HDC) using a Gingham graph for color placement (available for purchase here)
You will need:
Crochet Hook J/10 or 6 mm hook
Yarn Weight(4) Medium Weight/Worsted Weight – I used LionBrand Wool-Ease Yarn in Dark Rose Heather, Rose Heather and Blush Heather
Finished Size Each little square measures about 3×3. You can use this chart available on the LionBrand website to figure out how much yarn you need in order to make the size blanket you want. According to their chart, you will need approximately 1300 yards to make a 20”x30” baby blanket. http://www.lionbrand.com/faq
1st row: (RS). 1 hdc in 3rd ch from hook (counts as ch-2 and hdc). 1 hdc in each of next 2 ch. Turn. 1 block.
2nd row: Ch 5. 1 hdc in 3rd ch from hook. 1 hdc in each of next 2 ch – beg block made. Miss next 3 hdc. (Sl st. Ch 2. 3 hdc) in next ch-2 sp – block made. Turn. 2 blocks.
3rd row: Beg block. (Block) twice. Turn. 3 blocks.
4th row: Beg block. (Block) 3 times. Turn. 4 blocks.
5th row: Beg block. (Block) 4 times. Turn. 5 blocks.
Cont increasing 1 block each row until left side from beg measures desired length
Beg decreasing: Next row: Sl st in each of next 3 hdc. Block in each ch-2 sp to last ch-2 sp. Sl st in last ch-2 sp. Turn. Rep last row until you have 1 block in the row.