craftgrrl | easy scarf pattern

i'm pretty new to the art of crocheting and so far the only thing i've made is a scarf from the "i taught myself how to crochet" book i picked up at walmart. somehow, i agreed to make a scarf for a co-worker and i have 2 days in which to do it. can someone suggest a fairly simple/easy scarf pattern that can be whipped up in very little time. i have 3 skeins of homespun yarn and a skein of light and lofty yarn at my disposal. i'm ready to get started. i just need a pattern/instructions.