The LED language for the Arduino is still changing quite a lot. I've gotten rid of the whole cooperative multitasking thing in favor of a simpler interpreter that is now just a switch threaded Forth. As it gets more advanced I'm faced with some problems- whenever one designs a domain specific language there is the problem of how much power to give it. Right now it does not support variables (constants are supported but not built in) or any sort of parsing words or anything interesting like that. I'm running into the problem that Forths have on the Arduino, which is the problem of having your program stored in flash and running it out of RAM. I will probably just add some simple hacky variable system to keep things from getting out of hand complexity-wise (indices into an array that get expanded to accesses at compile time or something).
In terms of progress it has conditionals and loops, and supports execution tokens (the Forth term for this idea) aka function pointers aka almost higher order functions (with no combinators to construct new ones at runtime). Unfortunately it does not support getting the execution token of built in words, which is a pretty arbitrary distinction.
Incidentally, I have it working with a full 5 RGB leds, controlling all 15 pins nicely. More things need to be added to the language to get complex animations, but as it is one can fade leds, set colors, and having sequences of blinking lights.
Thats all the updates I can think of for now.
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