Disclaimer: I don't own the Teletubbies, and quite frankly I wouldn't want to. The BBC are welcome to them.
It took a while, but Black Dude realised that he had let the flowers and rest of the grass hilly things live. The Black Dude jumped into his ship and flew back to the dark teletubby land. He did not understand why the flowers had lived in the darkness. This confirmed that they were evil flowers and hills. He took out all his weapons, and destroyed the rest of the teletubby things. All that was left was an empty shell. The world was happy. Black Dude jumped back in his ship, and zoomed off.
THE END!