The dream is to receive donations of uniquely patterned scarves - using the logo as a colour guide. (For more details, check out this news story, which includes a downloadable .pdf regarding size, colors and the mailing address to send completed scarves). The project organizers want the scarves to be as unique as are the athletes! As scarves are collected, they plan to post pictures to the Special Olympics web-site listed above.
If not, you can use any pattern you want ... but I hope lots of knitters will join this effort to support our athletes this winter!