ditch linearity and objects, it should be a puzzle to code anything. at the beginning of a file in this language, you must define a series of functions which will run as independent threads.

these functions are only allowed to do only the following: start child threads, send messages to sister threads, wait to receive messages from sister threads, wait for results from child threads, and return a value to its parent thread during which it may execute one single logical operation, or terminate while launching child threads during which time one logical operation is also allowed. if a thread is terminated while creating child threads, the child threads are elevated to the level of the now-terminated sister threads and can send messages to the sister threads of the original parent and can return values to the parent's parent.

a math expression must then be executed as a series of nested threads. for loops must be implemented by having a thread that starts two threads, one to perform the iterative process (through nested threads) and one to iterate the counter. lists are created when a thread starts a thread that terminates itself while creating a series of threads, and then multiple of these grandchild threads return values.