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| Let us say that the child now wishes to teach the Turtle how to draw a circle. The Logo teacher may encourage the child to think Turtle. This could help the child realise that the Turtle will have to go forward a little, then turn a little, over and over again. Few children would have the patience to key in FORWARD 1, RIGHT 1 360 times. No child would be willing to repeat this chore every time s/he wanted the Turtle to draw a circle. This brings us to the third wise man. The third wise man is Guy Montpetit. His gift is the distribution to the general public of a disk containing the Logo language. A student of Seymour Papert, he returned home to Montreal to found Logo Computer Systems Inc. (LCSI) to manufacture and distribute software containing the Logo language. The mechanical Turtle on the floor can be replaced by a triangle on a screen and the keypad with a keyboard. A disk, supplied by LCSI, could be considered as the mind of the Turtle. It mediates between you at the keyboard and the Turtle-triangle on the screen. This disk solves the two problems mentioned above. The first problem of repeating FORWARD 1 RIGHT 1 360 tedious times is solved by simply typing REPEAT 360 (FORWARD 1 RIGHT 1). REPEAT is another Logo word which the Turtle understands because it is programmed into the disk. The second problem of repeating this process every time you want a circle is solved by teaching the Turtle a new word. This is done as follows:
TO CIRCLE |
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