I'm trying to create an app a little bit like JustGiving.com, which allows people who want to raise money for charity to sign up and create a 'campaign' page. On this page they outline what they propose to do (run a marathon or shave their heads for example) set a monetary target and then invite all their friends to sponsor them via email, twitter, facebook etc...
Friends come on and donate via paypal and the target gets nearer.
I want to make some kind of indicator to show how close to the target the campaign is. I'm not asking for help with graphics here but I had in mind a kind of thermometer arrangement that you might see on your local church fundraiser http://www.google.co.uk/search?q=target+thermometer&hl=en&prmd=ivns&tbm=isch&tbo=u&source=univ&sa=X&ei=-RfdTYrcEs-2hAeW65y3Dw&ved=0CDcQsAQ&biw=1280&bih=685
I'm building this site in an effort to learn cakephp, and I have to admit my knowledge of php isn't all that brilliant either so learning that too. I'm surprised how far I've got.
Anyway, I haven't a notion how I might go about doing this and wondered if some kind soul would give me a bit of a route map. If it's a cakephp route thats great but if it's just normal php thats cool too!