Step 6: On the left side of the Flash's head, where the circle and the jaw guides meet, draw a zigzag line similar to the letter Z as a guide for the lightning bolt on his mask.
Step 7: That's it for the initial sketch! You have the basic Flash shape. Now go in and tighten your drawing. From this point on, press harder with your pencil in order to get darker lines and a more defined sketch.
Step 8: Tighten the shape of the Flash's eyes as you make the lines darker. Draw the Flash's furrowed brow as a couple of curved lines.
Step 9: Draw the Flash's nose by using the vertical construction line as a guide. The top of the nose starts on the edge of the right eye and ends at the bottom of the original circle. Draw a small curved line on the left side of the Flash's nose for the nostril.
Step 10: Below the nose draw a long line for the Flash's mouth. Curve the line a bit to give this Justice League Unlimited character a smirk.