Somehow allow for this cool thing

[TropicSapling]

>> x = [1, x[0] + x[2], 3]
>> x
[1, 4, 3]

(a.k.a. creating a list based on it's own values before it even exists in this case)

This apparently works in some functional programming languages (Haskell is one of them I'm assuming?). This is related to lazy evaluation btw, so maybe consider that again?