Hello,
I've read your advertisement and would hereby like to show my interest for the position as a Graphic designer. It says that you are looking for someone to create background for your twitter account. I believe to be very fitting for the job.
For some examples of my work please visit my Freelancer portfolio or my website http://rosabrot.ch.
I am very much looking forward to hearing back from you and to answer any further questions or discuss possibilities.
Sincerly,
Maria Hanisch