Imitate how amber is formed and make up a 50-word story.

One noon ten thousand years ago, the burning sun shone on the forest, and many old pine trees shed thick turpentine, and the air was filled with the fragrance of turpentine.

A spider is spinning a web. When it spit out the first thread, a tired little fly tripped and accidentally stuck to the spider web. It immediately realized the danger, so it tried its best and finally broke the spider silk and landed on the trunk. Let's talk about spiders. The fly was overjoyed to see it stuck. Now that the fly has fallen, it refuses to give up and follows closely. When I was about to jump on it, something terrible happened: a big drop of sticky turpentine dripped down and wrapped two bugs in it. ...

Tens of thousands of years have passed, and the turpentine ball wrapped with two bugs has become crystal clear and priceless amber.