10 minute ATC challenge - grey

I challenge you to create an ATC in ten minutes or less! You choose the medium and methods. The finished product should still be a mini piece of art so choose wisely. You may, of course, set everything up before hand but work time should not exceed ten minutes.

For this round the majority color of the ATC should be grey. I will do 9 rounds of this challenge so that there are enough 10 minute ATCs to fill a pocket page.

I'm curious and excited to see what all of you come up with!