| This procedure will involve using a wait command and timings. This should be related to the work done on LOGO in Unit 4E 'Modelling effects on screen'. Children will also need to know how to edit their procedures.
Discuss accuracy of timing and language and how inaccuracy can lead to incorrect results.
Children who find this work easy could use a simple model of a motor and barrier, and write a procedure to raise and lower the barrier. They will need to understand that the barrier is raised by the motor going forward, and lowered when the motor goes backwards. They will need to be shown how to slow down the motor.
Children will need to know that there is more than one output socket and that the computer needs to know, through the language, which socket an output device is plugged into.
Activities should be related to 'real life' situations where possible.
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