1. Press the colorful sphere and count how many orange spheres there are each time:
According to the clue above the door, you have to put them in order from smallest number of spheres to largest number of spheres. So putting 245462 in order goes:
Press the keypad and enter 224456.
2. Proceed to the next 100 Doors 2013 Level!
Hit like if this walkthrough helped you! Thanks :)