Wavy Lines and Circles

It's been awhile since I've drawn, so today is a simple doodle that was fun to play with.  A pair of wavy lines with circles in gray, green, blue, and yellow.  I colored over some with a lighter marker for the uneven effect.

• Copic marker colors used: Custom color B2000, B14,45, C0,1,2,3, G24,40,46, Y11,15,19
• Pen: black 0.3 Copic multiliner
• Paper: Neenah, cut down to A2 size (4.25 x 5.5")