WEB TURTLE is a fun drawing program which uses what's called "Turtle Graphics" (the same thing the computer language "Logo" uses for graphics). The idea behind "Turtle Graphics" is that you have a turtle who's got a pen stuck to its tail. You give it commands (like "go forward", "turn left", etc.) and it draws shapes on the screen.Web Turtle can be used to help teach simple computer programming as well as the basics of geometry! It's completely web-based and doesn't use Java, plug-ins or software downloads, so it should work on almost any type of computer that has a web browser!
If this is your first time, start by playing with an existing example drawing. Use the "Available Commands" / Help page to find out how Web Turtle works. Then try creating your own programs by starting a new drawing.
New! August 2009 - A few enhancements:
- You can now get the remainder ('modulus') of dividing two numbers.
For example, 'LET A 12%5' sets the 'A' variable to '2'.- There are now multiple input fields, which you can access with '
^1' through '^9'.
(Plain '^' still works, and is a shortcut for '^1'.)- You can now print numeric and string variables.
For example, 'PRINTVAR X' or 'PRINTVAR $S'.- A bug preventing longer programs has been addressed
For example, commands like this would draw a square:
In English:
Draw with a Black pen
Do this Four Times:
Move Forward 10 Paces, Drawing
Turn Right 90 Degrees
What you tell Web Turtle:
COLOR BLACK
REPEAT 4
DRAW 10
RIGHT 90
NEXT
November 11, 2004 - Our ISP, Sonic.net, have upgraded their webservers. Web Turtle was down for part of today while I upgraded it. Sorry for any inconvenience!
"Web Turtle," created by Bill Kendrick, 1997-2004.
