You will need the pattern ( Illusion baby blanket by Steve Plummer )
YARN: (I am using Ella Rae Cozy alpaca.)
660 yard of light colored DK weight yarn
660 years of dark colored DK weight yarn
This will make a blanket approximately 32'' X 40''
Any yarn can be used. A thinner yarn will make a smaller blanket and a thicker yarn will make a larger blanket.
Needles: The illusion effect works best if knitted more tightly than usual, try using one size down from what the ball band recommends. They recommend a US 3 for a DK weight yarn. I have not swatched mine yet.