Better way to create Facebook Snake script?

[user2345098234]

Friend asked me to create one for him, but I'm new to AHK and the only way I know how to do this would be to constantly repeat something like...

sleep, 1900
Send {Up}
sleep, 700
Send {Left}
sleep, 1900
Send {Down}
sleep, 1500
Send {Right}

...until I make the snake go in a pattern around the board so that it eventually loops back. This way it wouldn't collide with itself at any point until it ate enough food to fill up the entire screen. This take ages though and is quite tedious to get right. Is there a faster way to make something like this?