i'm trying to make a div that can slide to the left without using jQuery UI, but for some reason the right border of a div twitches during animation. I would appreciate if you could help me.

Here is my code: 

1.      
2. var black = $('div.first'),
3.       red = $('div.second');
4. $(black).hover(
5. function(){
6. $(red).animate({
7. left: '-200px',
8. width: '200px'
9. }, 2000 );
10. },
11. function(){
12. $(red).animate({
13. left: '0',
14. width: '0'
15. } ,2000 );
16. }
17. );

Thank you!