MSW Logo Programming

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Selected MSW Logo Commands

Command	Action	Short Version
FORWARD 100	Turtle moves forward the specified number of units.	FD 100
BACK 50	Turtle moves back the specified number of units.	BK 50
RIGHT 90	Turtle turns clockwise the number of degrees specified.	RT 90
LEFT 45	Turtle turns counterclockwise the angle specified.	LT 45
PENUP	Turtle's pen is up. (Doesn't draw as it moves.)	PU
PENDOWN	Turtle's pen is in the down position.	PD
PENERASE	Turtle erases as it moves.	PE
HIDETURTLE	Removes the Turtle 'triangle' from the screen.	HT
SHOWTURTLE	Makes the Turtle visible again.	ST
CLEARSCREEN	Erases the screen and returns the Turtle to its "home" position in the centre of the drawing screen.	CS
HOME	Returns the Turtle to the "home" position without erasing the screen. (Issue a PU command before HOME to prevent it drawing its return path as it goes.)	HOME
LABEL [HELLO WORLD]	Displays text at the Turtle location.	-
SETPENCOLOR 1-15	Determines pen color according to: SETPC 4 = Red SETPC 2 = Green SETPC 1 = Blue	- -
SOUND  [1000 200]	SOUND [<frequency> <duration>] where “frequency” is in cps and “duration” is in 1000ths of a second.
SETPENSIZE [10 10]	Sets width and height of the drawing pen. MSW Logo uses only the second value. Set them both the same.	- --
BYE	Exits MSW Logo	-

 

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 1.      Open MSW Logo.

2.      Click in the Input Box.

 

3.      Type in the following:

           home           <Press Enter>

          FD 100        <Press Enter>

          RT 90          <Press Enter>

          FD 100        <Press Enter>

          RT 90          <Press Enter>

          FD 100        <Press Enter>

          RT 90          <Press Enter>

          FD 100        <Press Enter>

 

 

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	aDDING COLOURS TO MSWLOGO

 

Pen Color and Screen Color

You can change the color of the lines that the turtle draws with the SETPENCOLOR command. You can change the color of the screen (or background) with the SETSCREENCOLOR command.

Command	Example	What Happens
SETPENCOLOR color	SETPENCOLOR 2	Sets the color 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.

Color Index

The easy way to change the color of the turtle's pen is to give SETPENCOLOR a number from 0 - 15. Each number will set the turtle's pen to a different color, given in the table below. The number is called the "color index".

Color Index	Color Name	[R G B]	Color
0	black	[0 0 0]
1	blue	[0 0 255]
2	green	[0 255 0]
3	cyan (light blue)	[0 255 255]
4	red	[255 0 0]
5	magenta (reddish purple)	[255 0 255]
6	yellow	[255 255 0]
7	white	[255 255 255]
8	brown	[155 96 59]
9	light brown	[197 136 18]
10	dark green	[100 162 64]
11	darkish blue	[120 187 187]
12	tan	[255 149 119]
13	plum (purplish)	[144 113 208]
14	orange	[255 163 0]
15	gray	[183 183 183]

 

 

SETSCREENCOLOR 5

SETPENCOLOR 7

FD 100  <Press Enter>

RT 90 <Press Enter>

FD 100 <Press Enter>

RT 90 <Press Enter>

FD 100 <Press Enter>

RT90 <Press Enter>

RT 90 <Press Enter>

FD 100 <Press Enter>

 

 

 

 

 

REPCOUNT     COMMMAND

 

 

REPEAT COMMAND

Repeated pattern created using a square:

• Repeat 10 [square rt 36]
• Repeat 12 [square rt 30]
• Repeat 30 [square rt 12]
• Repeat 36 [square rt 10]

Repeated pattern created using a hexagon:

• Repeat 10 [hexagon rt 36]
• Repeat 12 [hexagon rt 30]
• Repeat 30 [hexagon rt 12]
• Repeat 36 [hexagon rt 10]