The best way is to have a look and study how someone else has gone about creating the image(s), and having ago yourself. Zooming in on the image to see how its drawn is a great method!
This link maybe of use to you to start with
http://panelmonkey.org/
There are others, just try google to find some more 2d sprites etc.
This link maybe of use to you to start with
http://panelmonkey.org/
There are others, just try google to find some more 2d sprites etc.