Press green flag, write a program, press Enter or the tick. Here's an overview of the language: Instructions are split by spaces. Any number given will put it on the stack. Any operator (+, -, /, *) will take two numbers off the stack and put the output on the stack. "read" will prompt you for a number. A period will hire a certain cat for precisely two seconds to say a number taken off the stack. (I would use "say" for this, but I'm not Linus Torvalds in my disregard for standards.)
Initially I wanted to make LISP after writing a LISP compiler, but S forms are hard to parse, even in languages where that's possible. This uses two procedures from the Scratch wiki: number detection and string splitting.
