# Mouse trail tutorial question

**URL:** <https://forum.kirupa.com/t/mouse-trail-tutorial-question/201379>\
**Category:** Uncategorized\
**Created:** [September 20, 2006, 8:13pm UTC](https://forum.kirupa.com/t/mouse-trail-tutorial-question/201379 "2006-09-20T20:13:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![fizzzzzzzzzzzy](https://avatars.discourse-cdn.com/v4/letter/f/eada6e/32.png) [@fizzzzzzzzzzzy](https://forum.kirupa.com/u/fizzzzzzzzzzzy)\
**Post date:** [September 20, 2006, 8:13pm UTC](https://forum.kirupa.com/t/mouse-trail-tutorial-question/201379/1 "2006-09-20T20:13:56Z")

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i was reading the mouse trail tutorial and i didnt get why  
this.\_x += (\_root[letters[this.id]].\_x-this.lastX)/speed  
would make the the x of the current letter a bit to the left of the letter before it instead of makeing the x values equal.  
I also didnt get while it was nessesary to state a variable inside the movie clip id as L since it refers to the current value of l anyway.  
any help?