Step #1
First commence the tutorial by making a circle.
Step #2
Draw outline for uneven circle.
Step #3
Draw uneven broad lines in middle of the circle.
Step #4
Make some more line at lower right side of circle.
Step #5
Move on to draw line at lower left side of circle.
Step #6
Make lines on upper left side of circle.
Step #7
Draw lines on top.
Step #8
Make some broad lines to fill the gap of right side of circle.
Step #9
Draw shape as shown in diagram at lower ouside of circle.
Step #10
Finally, make necessary improvements to finish.