How to repeat the format in @printf?

General Usage
12

A quick thing, is it possible to print these stuff in a txt file?

I tried things like

f = Printf.Format("%9.3f"^4)
io = open("myfile.txt", "w")
for i in 1:10
    @printf(io, f, 1,2,3,4)
end
close(io)

But it does not work.

I expect to have a file called myfile.txt in which it should have such 5 lines,

1.000     2.000     3.000     4.000
1.000     2.000     3.000     4.000
1.000     2.000     3.000     4.000
1.000     2.000     3.000     4.000
1.000     2.000     3.000     4.000

Thank you!