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| Light (and temperature) sensors can send a message (or several messages) when their input level falls below (or rises above) the value set by the slider. |
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To begin with it is best to think of actors as simply responding to BEGIN messages, which cause them to send BEGIN messages on to other actors or specific messages to output objects, e.g. to turn on a light. The only complication at this level is that messages can be sent on immediately that the actor receives a BEGIN message or after some delay. |
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| The edit window for the ouput objects allows you to test them out. It is usually necessary to test out motors in order to discover the relationship between clockwise/anticlockwise and up/down, forward/backwards etc. |
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