TypeError: Error #1009: Cannot access a property or method of a null object reference.
	at DNA::DNAKey$iinit()
	at DNA::KeyThymine$iinit()
	at DNA::DNAStrand/addLock()
	at DNA::DNAStrand/initialize()
	at DNAGame/DNAGame::startGame()
	at DNAGame/buttonPressed()
	at button::CallbackButton/onRelease()