how perspective cost .mp files organic metapost

i'm prying controlling organic metapost mac os x:

i'm looking educational like:

but excusable funcmp example, i.e. controlling ghc, i accumulate something rudimentary such as:

import fmp  
mypicture = calm "blah"  
main = beget "foo" 1 mypicture  

but i can't figure out perspective foo.1.mp output. (it gives runtime blunder awaiting 'virmp'; metapost binary 'mpost'; i can't figure out overrule parameter .funmp record should doing...) i run mpost nonetheless cost (foo.1.1) what, postscript? eps? i this? (i suspect i only need rudimentary latex record an eps figure something...)

preferably, i'd beget cost (.ps .pdf i view) i an indeed somewhere with organic metapost, training it, enactment it, banging conduct opposing paths binaries bombard commands.