Scratch

I'm playing around with some turtle type graphics while getting the hang of this program.

I don't seem to be able to get the broadcast to repeat. I'm expecting the routine below to draw a spiral, but the broadcast to circles does not get repeated.
[blocks]

<repeat( 6
<broadcast[ circles]

[/blocks]

I expected the broadcast be called 6 times, but instead it gets called once and then stops.


[blocks]
<when I receive[ circles
<change{side  }by( 1
<repeat( 12
<move(side  )steps>
<turn cw( 30 )degrees>

[/blocks]

I can work around it by skipping the broadcast and using nested loops - that works fine, but I would like to be able to call named broadcasts, as it would make it easier to keep track to code later on when it the code gets more complicated.

Am I overlooking something?  How can broadcasts be called more than once?

Thanks