Watch and enjoy. Press space to show the settings. Recommended: size-7 black opacity-25 height-10. If it's laggy set black opacity to 100. If you want to see how I made it click see inside (there are comments that explains how it works).
Changed black background and sprite to green. This gives a green screen affect. Record a video and then use it for special effects in iMovie (or other movie editor) as a video overlay. Also removed the sound and heart shaped effect.