BAD THINGS. At least some of the elements would react together, explode (probably oxygen and hydrogen, or some other things), and melt your face off. And you would die from radiation poisoning.
You would struggle to get all the elements in the same place though!
I’m pretty sure it would be brown. Ever mixed lots of paint colours together? Brown, always brown.
But like Adam says, it would be pretty tricky, because some things will catch fire, some things would float away, some things would radioactively decay and kill you. Sounds like a recipe for disaster!
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