Box in shapes

In this puzzle only one rule, wooden boxes must stand on the owl place for at least five seconds. How do you achieve this, no one cares, you can come up with a clever mechanism or manually keep these boxes, constantly balancing. Usually, in addition to basic boxes that afraid of the water, in the game provide additional mission that can be used to achieve the goal. Area where he would need to set record-boxes, outlined by a dotted line. You need to come up with and implement a plan, in which you can install the boxes in place.