JS turtle fiddle draws turtle graphics using JavaScript and canvas from user supplied code. The project also contains a small server that can be used to save and share the code snippets.
I have a copy hosted at http://188.166.135.82/html/turtlefiddle/index.html
The turtle code is just JavaScript code that is evaluated when the user presses the run button. The turtle can be steered using the following commands:
f(x) moves the turtle forwards by x
r(x), l(x) turn the turtle x degrees clockwise and counterclockwise
u(), d() raise and lower the turtle's tail
c(x) set the color of the drawn line. Valid formats for x: *'red'*, *'rgba(43,255,12,0.5)'*
c() sets a random color
clear() clears the screen
fade(x) fades the screen by x*100 percent
center() centers the turtle
speed(0) instantaneous drawning.
speed(x>0) The drawing speed is set to x pixels per second.
To run the server, install Node.js and issue the commands
npm install
node server.js
at project the project folder. Then navigate to http://localhost:5000 with your browser.