draw a circle, then go to the second frame on the timeline(up top) right click, insert a new keyframe, youll see a new frame with a circle in it apear on the timeline, go back down to the white square(technical term is "stage") then move the circle over, you can also right click the circle, and scale it or rotate it, congradulations, youve just moved a circle, now if you take a shitload more time you can draw whole people and move their joinrs and objects along a whole line of frames to simulate motion. it just takespractice and patience.