Confused about making a fondant bow.?

At school for our food technology lessons we made christmas cakes and then left them for a while, this week i am icing my cake and I want to make one similar to this: a href="http://www.google.co.uk/imgres?imgurl=http://images.pinkcakebox.com/cake197.jpg&imgrefurl=http://blog.pinkcakebox.com/christmas-day-gift-box-cake-2006-12-26.htm&usg=__NfLxE-CdYSHD2xh3OWAsb-7ccg4=&h=307&w=400&sz=43&hl=en&start=20&sig2=eDqL_kRAjxzTcVUp8dd2Bg&zoom=1&tbnid=LxihBxsT2MtMxM:&tbnh=165&tbnw=223&ei=aPUATen8Ecm24AbepIz0Ag&prev=/images%3Fq%3Dchristmas%2Bcakes%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1280%26bih%3D685%26tbs%3Disch:10,405&um=1&itbs=1&iact=hc&vpx=355&vpy=291&dur=455&hovh=197&hovw=256&tx=182&ty=125&oei=Y_UATfrFFdWAhAfD4JXuBw&esq=2&page=2&ndsp=15&ved=1t:429,r:1,s:20&biw=1280&bih=685" rel="nofollow"http://www.google.co.uk/imgres?imgurl=ht…/a ( my cake is a lot smaller than that and a circle shape) I was doing some research on the internet about how to make one and now I'm confused! I am using ready to roll fondant icing and my lessons is two hours long, how long would I need to leave the bows to dry and I need to be able to put them on the cake before the lessons is over. Oh and I'm from the UK so if I need to buy anything else it has to be available in tesco. Sorry for the long winded question, I just had so much stuff to ask!!