Biohazard Keep Out door sign

Tell me a teenagers who does not want to keep their parents or siblings out of their room? Well, what better way to demonstrate it then putting up a biohazard sign on your door? Considering the odours, piles of old laundry, and old food left overs, it may actually prove to be kinda biohazard to enter their room :-) 

Should have been printed using yellow filament, but I did not have any… 

It looks smaller on my picture then it actually is. Heigth: approx 120mm, width: 140mm

If you do not have a dual extruder, then add a filament change at layer 18(or simply paint it)