Page 65 - Computing E-Book Grade 3

The City School 2021-2022

Even though the turtle just drew a square, he
didn’t learn how to draw a square. If you type in Checkpoint

SQUARE, the turtle will say something like I don’t urtle
Logo is an interactive programming
know how to SQUARE. Try it. language that is simple, powerful, and
best of all fun.
If we want the turtle to learn how to draw a The REPEAT command allows you to
repeat commands a specific number of
square, we have to give him an instruction that time. Coding T

teaches him how.
Now you can use REPEAT command to draw a rectangle, pentagon or any other

polygon. It is only possible if you know at which angles turtle has to turn and how
many steps (commands) have to be repeated to create the required shape.

Always remember that to create a shape involving angles, you have to divide 360 by
the number of sides of the shape, which you want to draw.

For instance,
• If you want to create a pentagon then you have to divide 360 by 5 to get the

angle that will be used to create a pentagon by turning left or right.
• If you want to create a hexagon then you have to divide 360 by 6 to get the angle

that will be used to create a hexagon by turning left or right.
You can draw any shape using the directional command and angles in FMS Logo.

4.5. Changing PEN and SCREEN Colour

You can change the colour of the lines that the turtle draws with the SETPENCOLOR

command. You can change the colour of the screen (or background) with the
SETSCREENCOLOR command.

Command Example Description

SETPENCOLOR color SETPENCOLOR 2 sets the colour that the turtle

draws to green.
SETSCREENCOLOR color SETSCREENCOLOR 2 Fills the entire screen with green.

Anything on the screen will be
erased. The turtle is not moved.

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