# When should you use class and movieclips?

**URL:** <https://forum.kirupa.com/t/when-should-you-use-class-and-movieclips/329821>\
**Category:** flash\
**Created:** [October 20, 2012, 6:38pm UTC](https://forum.kirupa.com/t/when-should-you-use-class-and-movieclips/329821 "2012-10-20T18:38:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![John4213](https://avatars.discourse-cdn.com/v4/letter/j/8edcca/32.png) [@John4213](https://forum.kirupa.com/u/John4213)\
**Post date:** [October 20, 2012, 6:38pm UTC](https://forum.kirupa.com/t/when-should-you-use-class-and-movieclips/329821/1 "2012-10-20T18:38:36Z")

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Hi, I’ve read tutorials on it but I’m not really sure when to use class files for movieclips (specifically particles such as falling blood and debris). What’s the advantage of having several movieclips each with a linked class file (each with an ENTER\_FRAME event) over an array which controls each particle with a single ENTER\_FRAME event?

This is the tutorial in which movieclip has its own class file: [http://www.kirupa.com/developer/flashcs3/movieclips\_classes\_AS3\_pg1.htm](http://www.kirupa.com/developer/flashcs3/movieclips_classes_AS3_pg1.htm)