Revised story.

Beginning

-Grey planet in the space.
-as the camera zooms into the planet, the robot flies in the background.
-The camera zooms in and shows the inside world. The robot lands on the ground.

Middle

-The robot wonders around grey, lifeless world.
-While the robot moves, in the background, everything begins to peel off and reveals the life underneath it.
-The robot turns back. Everything changes back to lifeless, so the robot won't see it.
-When the robot turns back to front (towards the camera), everything in the background changes again.
-The robot leaves (flies away) without seeing anything.

Ending

-The robot leaves the planet. The camera pulls out to show the entire planet while the robot leaves.
-The camera zooms out and shows the whole view of the planet, which is still in grey stage.
-Right after the robot flies away, the planet changes to its colorful form, and it changes back to its grey stage.