Can you help Fifi?

Hi everyone. I just made these two yummy widgets for you to put on your blogs. The one on the left links to fifi's blog and the one on the right links to fifi's etsy shop. However, I am tearing my ears out trying to work out how to add a simple button saying add to my blog via blogger. I want to make it super easy for you all by creating a button that you simply click and it adds it.

can anyone help work out the code? or know someone who can? I found this but have tried it loads of times and I just can't get it to work - HELP!