Graffiti in D block lift

We found this penciled graffiti in a D Block lift at Mantri's the other day.. Someone has taken his/her time over this.  I mean, this piece of graffiti couldn't have been done during a trip or two, up and down, in our lift. It takes barely a minute for it to move from basement to the top (12th) floor; and another minute downward.
I wish the graffiti artist at Mantri's comes forward to own up the piece of elevator art. We could do with his services  to paint our driveway pots. It has been quite a while since we held a pot-painting event at Mantri's .