How to
ArtLogo UI
ArtLogo has 3 distinctive areas. On the top right is the Turtle canvas. That's where the Turtle draws.
Underneath the canvas is the command center, where you can try commands, like: clean and
fd 100.
And finally on the left is the procedures area where you write your Logo programs.
Before you start writting programs you can try some Logo commands in the command center.
Try:
fd 100
and
clean
to clear the screen and return the turtle to the center.
You can try out other the commands described in the Reference section. There are many code snippets that you can copy and paste into the command center.
Try:
fd 100
and
clean
to clear the screen and return the turtle to the center.
You can try out other the commands described in the Reference section. There are many code snippets that you can copy and paste into the command center.
Colors and Shades
The color numbers in ArtLogo are between 0 and 100.
The shade numbers are between 0 and 100.
The shade numbers are between 0 and 100.
Color
0
10
20
30
40
50
60
70
80
90
-9999
Shade
0
10
20
30
40
50
60
70
80
90
100
The default color is 0 and the default shade is 50.
Black is color -9999 and shade 0.
White is color -9999 and shade 100.
Black is color -9999 and shade 0.
White is color -9999 and shade 100.
Coordinate System
Here is ArtLogo's coordinate system. The Turtle's default position is (0, 0), which is the middle of the ArtLogo canvas.
Defining Procedures
Procedures provide a way to define a new word as a sequence of commands.
A procedure starts with the word to
followed by its name and it finishes with the word end
Copy this code snippet in the procedure area:
to dash
pu
fd 6
pd
fd 6
end
Once a procedure has been defined it can be used just the way a built-in command is used.
Try this in the command center:
repeat 10 [dash]
or just add these two additional procedures in the procedures area:
Then press Command + G
Copy this code snippet in the procedure area:
to dash
pu
fd 6
pd
fd 6
end
Once a procedure has been defined it can be used just the way a built-in command is used.
Try this in the command center:
repeat 10 [dash]
or just add these two additional procedures in the procedures area:
to go
repeat 10
[setxy 0 0
dashes
rt 36]
end
to dashes
repeat 10 [dash]
end
repeat 10
[setxy 0 0
dashes
rt 36]
end
to dashes
repeat 10 [dash]
end
Then press Command + G
Procedures with inputs
To create a procedure with an input add an input name starting with a colon
to dash :stepssetps :steps / 2
pu
fd :steps
pd
fd :steps
end
The dash command now takes an input. When dash runs, the value of the variable :steps will be that input.
clean repeat 8 [dash 12]
to dashes
repeat 10 [dash 8]
end
Then press Control + G
clean repeat 8 [dash 12]
to dashes
repeat 10 [dash 8]
end
Then press Control + G
Saving Projects
In the Command Centre type saveimage and then the name of your project inside single quotes. It should look like this:
saveimage "HelloWorld
saveimage "HelloWorld
Downloading Samples
To download sample projects, in the Command Centre type: downloadsamples
This will give you a folder with numerous samples to animate or use as inspiration.
This will give you a folder with numerous samples to animate or use as inspiration.