I've been ill the last couple of days which meant I couldn't really focus on anything too heavy. So with being awake half the night I thought I should just play around CSS3 and it didn't take long till I came up with a pure CSS3 Post-it note made with no images. The only extra library I have used in this demo is Google Fonts for the script text. Code after the note:
Quick discaimer - I have no ideas which browsers this works in. All I can tell you is that it looks good in Chrome and Safari!