Event Decorations are a reward for completing Event Quests, which you receive in your Drop Box as a gift. For the duration of the Event, more event themed decor is available from the Build menu. There are usually four pieces for each event; two sold for farm cash and two for gold.The time for the building if you even win but I doubt you will is within seconds. So all those epople who actually look at this page lol.Edit

Decor Spesial 6
Spesial decor 2
Decor Event 1
Decor Hawain 1
Decor Hawain 2
Decor Hawain 3
Decor Spesial 5