The song incorporates elements from "Perpetuum Mobile" by Penguin Cafe Orchestra, as written by Simon Jeffes.
Heart of Darkness | Edge of Darkness | Warcraft II: Tides of Darkness | Fade into You | The Whisperer in Darkness | With Fear I Kiss the Burning Darkness | When Darkness Comes | Under Cover of Darkness | The Ghost and the Darkness | Star Trek Into Darkness | Slow Fade | Our Lady of Darkness | Land of Silence and Darkness | Darkness Dynamite | Darkness | Beyond the Darkness | Sparkle and Fade | Prince of Darkness | prince of darkness | Light in My Darkness | Lest Darkness Fall | Green Darkness | Friendships Often Fade Away | Fade to Red | Eclipso: The Darkness Within | Daughters of Darkness | Darkness on the Edge of Town | Darkness at Noon | ''Christ in Triumph over Darkness and Evil'', stained glass | World of Darkness |
"Collide" by Leona Lewis and Avicii, based on "Perpetuum Mobile" by Penguin Cafe Orchestra, and "Penguin (Fade Into Darkness)" by Avicii