莱特兄弟是怎样发明飞行器的？请给下列句子排序。

____ They watch how the birds fly.

____ They fly like birds.

____ They draw a picture of their flying machine.

____ They want to invent a flying machine.

____ They build the flying machine.

____ Wright brothers like to invents things. One day,they are watching some birds flying in the sky.