[squeakland] Slow down turtle graphics rendering?

[R.D. Latimer]

Etoys renders very fast, which is good. But is there a way to slow down the
graphic rendering so students could see it unfold?
I have a simple spinSquare project:

drawSquare script
  repeat 4: forward 150 turn 90

spinSquare script
  repeat 36: drawSquare turn 10


I only need to run the script once, with the ! , I'm not using the clock
timer to continually display.

The design pattern of the spinning squares happens instantaneously. Can I
slow this rendering somehow? like with an internal 'wait' or 'pause' for a
fraction of a second.

Thanks,
Randy Latimer
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