What could it mean?

[topum]

Saw this graffiti on a construction site fence and keep wondering what it could mean.

Comments

[beautesauvage13.livejournal.com]

Someone aspiring to go from a happy smilie to a devil happy smilie? 

Athena

[topum.livejournal.com]

Might be, yes.

[itsjustc.livejournal.com]

'If I'm happy while I'm awake, then while I sleep, I will have all sorts of happy thoughts and dreams'. :)

[topum.livejournal.com]

Good one ).

[prorsus.livejournal.com]

Closed the eyes and got a nose, two teeth and two horns (or antennae). Hmm..