Making a ashtray...

Hey everybody, I got a solid block of wood that has this deep dark purple and I'm trying to make it into a semi-standard ashtray but I wanna maybe try some funky stuff too. One thing I'm gonna attempt is to chisel in symbols and such onto the 4 corners of the tray.

So what I need from you guys is some some brain storming for symbols, designs, emblems etc....

And there will certainly be photos of its progress soon enough, it's just hard to work in a garage when it's 30 degrees outside haha