First I set up the size of a new document, then I had to get the timeline to create a gif up so you go to window timeline and it should come up as a bar at the bottom.
I then created 7 layers with one shape on each layer and I changed the time of the key frames to make sure each layer is on for long enough but not too long. This was done by highlighting all the frames and clicking on the drop down arrow and choosing the right time.
I changed the colour of each shape and then saved it as a gif. I loved creating this as it was totally different and easy to make ad there is so many different ones you could make.
