the weird car...

last month (October 22nd) I was leaving school.... and suddenly I saw this car across the street from my uni....
The first thing I thought was that it had been "decorated" like that, because of the comming holidays:
*October 31st Halloween
*November 1st All souls day
*November 2nd death day.
and after a few more days, I found two more cars like this one. And one of them was being driven ¡¡¡¡¡¡ 0_O ¡¡¡¡¡¡
I still do not know why they were like that, and I havent seen more cars like that..... If you happen to know anything related to them, tell me its meaning... I am corious about it.