playing with io's do()

scoping.io

# so, because of scoping inside of do(...) I have to do:
Color greyscale := method(
    i := intensity
    grey := Color clone
    grey red := i
    grey blue := i
    grey green := i
    return grey
)

# and I can't do anything like this?
Color greyscale := method(
    i := intensity
    grey := Color clone do(
        red := i
        blue := i
        green := i
    )
)