After you click the green flag, click "ORNAMENT". A stack or ornaments will appear in the "Your ornaments!" Drag all 15 ornaments onto the tree. YOU MUST DRAG ALL OF THEM! Once on the tree, click on the ornaments to change their color! When all 15 ornaments are on the tree and you are done changing their colors, click done and take a screenshot! Have fun and MERRY CHRISTMAS!!! (I couldn't sleep last night so this is what I was doing. hehe)
Everything by me!