Icehouse is a charted design by Shannon Okey designed as a scarf. You can knit it in any yarn you like, and in multiple ways: as double-knit, as stranded color work (there are some very long floats in parts of the pattern, I recommend Kaffe Fassett’s method for twisting the yarn as you go to keep the floats stable), or as a knit-purl pattern.
Depending on the yarn and knitting technique chosen, as well as your personal gauge, you will need different size needles: do a test swatch to determine what works best for you.