Project Notes

LOGO, implemented in Scratch, with Kitten Graphics™. Try this:

make "size 100

to square repeat 4 [ fd :size rt 90 ] end

repeat 10 [ square rt 36 make "size :size - 10 ]

Also, try this:

repeat 360 [ fd 1 rt 1 ]

And compare execution speed to a "native" Scratch program.

Press the flag to clear all variables and procedures you have created and start over from a clean slate.

Limitations:

Only global variables are supported.

User defined procedures can't take arguments (but they can use the globals).

You can't define a procedure and use it in the same command. For example, this won't work:

to square repeat 4 [ fd 100 rt 90 ] end square

The only primitives supported are:

fd, rt, lt, bk, cs, repeat, repcount, make, to, add, subtract, multiply, divide.

Also, the binary operators +, -, /, and * will work in expressions. These are equivalent:

fd add 50 50

fd 50 + 50

More complicated expressions (fd 10 + 10 * 10) will work, but the order of operations is a bit weird. Use the "functional" syntax (fd add 10 multiply 10 10) if this is a problem.