用英文单词long long ago写一个英语小故事写

Long long ago,there was a boy,his name was Jason.he want to know what was the periodic motion of a planet.But he didn't really know what was it?When he grew up and went to the high school,He learned something about the periodic motion of a planet.He was curious about it.I studied at library every day.Finally,he found what was the periodic motion of a planet.