Nowadays flash is used extensively for web presentations. As the content for the flash movie increased and its file size also gets increased. When the file size gets increased means it will take more time to load up. This may cause distraction of visitors from your website. So keeping the file
size as small as possible gives your greater advantage. For this purpose we can split a large flash movie in to small movie clips and call them as external movie at runtime. This will greatly reduce the loading time.

First we will make the child movie which is going to load in to the main parent movie. For simplicity we will make a fade out text flash external movie clip as child movie.

Making of external child movie -

Steps:

• Open a new flash document of any size as you want.
• Take the text tool and type in some sentences for the movie.

• By selecting the text, press F8 and convert it in to a movie clip.
• Now select the first frame, right click and select "create motion tween".
• Then click on the 10th frame of the same layer and press F6.
• Now we have to create fade out effect for the text appearance. Goto the first frame and select the movie clip. Open the properties window. On the color list, select "alpha" and set the value at 0%.
• Next create a new layer and name it as "Action".
• By selecting the 10th frame, open the action panel and write the actionscript
  stop();
• Now save this flash file in the name "movieclip" and publish it.