Part B of a Traffic Light simulation used as a Scratch tutorial. Press Green flag and then spacebar to view outcome.
This version moves on to convert the traffic light into a pedestrian light.
Get the children to fill in the unused costume and name it AllOff.
Show how to make the amber light flash on and off by switching costumes with short delay inbetween.
Then introduce the concept of the repeat loop to produce a pedestrian crossing light.
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