#llats18: Yesterday’s life event, feedback, next life events

Andreas Formiconi

Yesterday we talked about Turtle Geometry and three of the fundamental software constructs: loops, procedures and variables. It has been a good meeting.

We stressed the crucial notion that the first few instructions we have learned are those needed in Turtle Geometry and, most important, to teach Logo to kids. The instruction are:

HOME	Send the Turtle to the center of the page
CLEARSCREEN	Delete all the graphics in the page
FORWARD 100	Go forward by 100 points
RIGHT 90	Turn right by 90 degree
LEFT 90	Turn left by 90 degree
REPEAT 4 [ … ]	Repeat 4 times the instructions between square brackets
TO SQ … END	Encapsulate instructions between “TO name” and END in a procedure named SQ (or whatever you want to call it)

You may learn other commands in the following but these may be useful to produce fancy graphical effects or to teach other…

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