Online class

Today is online class. Yesterday, I had a try to do a spring animation, for one classmate asked me whether I could do a Flash file to show spring in Physics. She just played a joke, for my english name is Spring. Then I had a try. I dis this design by myself.
Firstlly,I thought how to present the spring's animation. I designed a movie. After finished, this movie was in the library.
Secondly, I designed two layers. one layer was as the first page. Another layer was the place for animation. A button was put on the first page. When user press the button, the animation will play.
Although it is a simple animation, I have learned more.
At the beginning, I am confused about Frame, Key Frame. During this doing by myself, I make a clear understand. Learning in doing is indeed effective.