1. Download a program called paintbrush (http://paintbrush-mac.en.softonic.com/mac)
2. get a picture to base it off of (you can draw your own if you want)
3. open the picture up using paintbrush.
4. set it so that the width and the height are both "50"
5. click "view" and then click "zoom in" until its zoomed in enough to draw on.
6. save the image once your done with it as a gimp file and uploade
7. profit$$$?