When I was out in the car today, I drove by a crew pouring a new section of concrete. I know that I shouldn't have, but today I succumbed to the temptation and drew in fresh cement.
The job was completed and the workmen were gone when I drove by again on my way home. The strip of wet cement was dark gray and pristine. I parked the car a little way down the street, got out and checked in both directions to make sure no one was watching. I grabbed a pencil out of the car and walked stealthily over to the new area.
I used the tip of the pencil to draw a small heart (about an inch tall) in the corner of the square. It was pretty inconspicuous unless you happened to be looking for it. After I finished, I was worried that someone would catch me and I quickly walked back to my car.
I'm looking forward to going back and seeing my creation next time I'm in the area.