This one isn't based on anything specific, just wanted to write something with a lydian feel and try ending it with ascending major triads in tritones. The triads in question here are Cmajor to F#major. Even though it's sounds a little "out" it works pretty well since the #4 is already firmly in your ear once that section begins. The flute melody close to the end is the same as we've already heard but with quite a lot of ornamentation.
Here's the sketch: