There is one game object containing the background sprite. It is set at Z position 0. The bunny is another game object containing a sprite. The bunny game object is at Z position 1.
function init(self) go.animate(".", "position.x", go.PLAYBACK_LOOP_PINGPONG, 600, go.EASING_INOUTSINE, 3) -- <1> end --[[ 1. Animate the game object's ("." is shorthand for the current game object) x position between start position and 600. --]]
If you want to play with these examples, you can get the project on Github.
Do you want to see more examples? Why not write a few yourself and submit a pull request? We love contributions.