Steve features

Hi, 
I've recently started using breve for a cockroach walking simulation. Thanks to 
Jon for writing this program, it's saved me much time I would have spent 
duplicating his work. 

I'm also thankful for the steve programming language, which I've picked up 
remarkably quickly.

I have run in to some issues though, which might be due to my lack of 
knowledge. 

Are the following things possible in steve:

1) declare variables anywhere in a function, not just at the top
2) switch statements
3) using random[1.0] to set the members of a matrix or list of numbers to some 
value (0-1.0)

All three of these would simplify my code. Does steve allow them?

-Alex Rubinsteyn
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