Step #1
First commence the tutorial by making a circle, twocurve lines inside the circle & a triangle.
Step #2
Make two circles & a spiral line connecting both circles.
Step #3
Make eyes & retinas.
Step #4
Draw outline for face & nose.
Step #5
Draw an antenna & upper body shell.
Step #6
Make middle body shell.
Step #7
Make lower body shell.
Step #8
Make lines over the face and upper shells as shown.
Step #9
Draw further lines over the bottom shells as shown.
Step #10
Finally, make necessary improvements to finish.