function advanceRNG()
    local temp = RNG2
    temp = bit.rol(temp,2)
    if (bit.check(temp,8)) then temp = bit.set(temp,0) end
    temp = bit.clear(temp,8)
    if (bit.check(temp,9)) then temp = bit.set(temp,1) end
    temp = bit.clear(temp,9)
    temp = bit.bxor(temp,RNG1)
    local carry = bit.check(temp,0)

    RNG2 = bit.bxor(RNG2,RNG1)

    temp = RNG3
    temp = bit.bxor(temp,RNG1)
    RNG1 = temp

    RNG1 = bit.rol(RNG1,1)
    if (carry) then RNG1 = bit.set(RNG1,0) end
    carry = bit.check(RNG1,8)
    RNG1 = bit.clear(RNG1,8)

    RNG2 = bit.rol(RNG2,1)
    if (carry) then RNG2 = bit.set(RNG2,0) end
    RNG2 = bit.clear(RNG2,8)

    RNG3 = RNG3 + 1
    if (RNG3 == 256) then RNG3 = 0 end

    --print(tostring(RNG1))
    --print(tostring(RNG2))
    --print(tostring(RNG3))
end