Let's take a look at the yarn you'll need for Square #21!
Easy
-Light Blue (or other background color)
-Black
-Red
-White
-Tan
Medium
-Light Blue (or other background color)
-Black
-White
-Red
-Yellow
-Tan
Hard
-Light Blue (or other background color)
-Black
-White
-Red
-Yellow
-Tan
Costume
-Light Blue (or other background color)
-Black
-White
-Red
I chose the "hard" chart for this square. So let's take a look at what I came up with from my stash!
-Light Blue: Bernat's "Handicrafter Holidays" in Blue Icicle
-Black: Caron's "Simply Soft" in Black
-White: Hobby Lobby's "I Love This Yarn" in White
-Red: Hobby Lobby's "Hint of Silk" in China Silk
-Yellow: Red Heart's "Super Saver" in yellow
-Tan: Caron's "Simply Soft" in Bone
-Black: Caron's "Simply Soft" in Black
-White: Hobby Lobby's "I Love This Yarn" in White
-Red: Hobby Lobby's "Hint of Silk" in China Silk
-Yellow: Red Heart's "Super Saver" in yellow
-Tan: Caron's "Simply Soft" in Bone
Any guesses for Square #21?