Logo is a fun language that was created to teach new programmers. The language was developed in 1967, the word logo derived from the Greek logos, meaning thought. Logo is best known for its “turtle graphics” — where the programmer can draw lines and shapes by controlling an on-screen “turtle. The bot runs Apple Logo II, which was released in 1984.
Tell the bot that your program is in Logo (as opposed to one of the other languages it supports) by starting your tweet to it with {L}. The rest of the tweet will be your logo program, with each line of code on a new line. (You can combine the L directive with the bot’s other directives. For instance {LGS60} will run a program in Logo on a green screen for 60 seconds.)
The bot runs Logo code in immediate mode. It doesn’t make a whole lot of difference, really, except to know that you don’t need to deal with building Logo procedures (although you can if you want to.)
If you are just getting started, Adafruit has a nice little primer about Apple Logo. Complete documentation is in the Apple Logo II Reference Manual, published by Apple Computer in 1984.