Here's mine in JavaScript, done as exercise 51 of Chapter 5 of SICP: http://boshi.inimino.org/3box/inimino/projects/SICP/chap_5/Ex51/src/test.html http://boshi.

Here's mine in JavaScript, done as exercise 51 of Chapter 5 of SICP: http://boshi.inimino.org/3box/inimino/projects/SICP/chap_5/Ex51/src/test.html http://boshi.inimino.org/3box/inimino/projects/SICP/chap_5/E... It's an incomplete toy level Scheme subset with bugs, but it has HTML5 canvas support and some cute features like showing you the progress of the VM instead of hanging the browser, and call/cc. I'd like to finish it someday.