Scratch

I was just wondering how I would go about stamping a sprite along x and then moving down y and then stamping across x. repeat

Here is what I have:

When flag clicked
clear
set size to 50%
set x to -183
set y to -126
stamp
{REPEAT 6}
move 60 steps
stamp
{END REPEAT}

the image goes like this

X  X   X  X  X  X

I want it to do this..

X  X  X  X  X  X  X

X  X  X  X  X  X  X 

X  X  X  X  X  X  X  etc..

Please explain to me how it is done and why.

Thanks