Add your picture to our Flickr group of messages to the new prime minister and deputy PM

Eighteen months ago, on the morning after Obama's historic presidential victory in the US, we created a Flickr group called A Message for Obama, in which we encouraged web users to submit images of their personal messages to the president-elect before he took up office.

Within a week, we had a thousand images, covering a range of hopes, fears and instructions, from Guardian readers and Flickr users all over the world. Within three weeks, we'd collaborated with participants to publish a book of images as a unique record of the way people were feeling and what they were thinking in the days after the election.

Looking back at the images in the Flickr group pool, and flicking through the book, you can't help but be reminded what a great sense of anticipation there was in global reaction to the result.

A Guardian message to Obama. Photograph: guardian.co.uk

Flash forward to today, when after a tumultuous (and extended) election, we find ourselves at the dawn of a different kind of political reality in the UK – coalition government. It's historical in its own right, certainly interesting, and with just as many questions and concerns surrounding it as the American election of 2008.

With that in mind, we've created a new Flickr group: A message for Cameron/Clegg and invite you to submit photos of your message to our new Con-Lib Dem coalition government.

What would you like them to do first? Or not forget? Where should they focus their attention and energy while the coalition is working?

To participate, just follow the steps below:

1. Write your message on a bit of paper (or an envelope, or a post-it-note, or a napkin, or your hand ... or anything at all). Write it clearly so we can read it*

2. Take a picture (even a cameraphone or webcam shot will do)

3. Add it to the group on Flickr

We'll feature some of our favourites here on guardian.co.uk

* Please try and keep it constructive/civil. That doesn't mean your message has to be positive or even particularly nice, but we'd like messages to be appropriate for a diverse audience, which means we'd rather you avoided being very offensive if you can help it. There are loads of other places on the web where you can upload doctored photos of the party leaders, your opinions of the election, parties and so on, but this group is not for them. Sorry.