Navigation Menu with Accordion Drop-down Sub Menu css animation

https://www.youtube.com/watch?v=TmQm-p3wCSU

https://www.youtube.com/watch?v=BoKwM_979XI&list=PLl1MmKpV0eieAACJx-rTMnmKYfcBOjqKN

https://www.youtube.com/watch?v=qL01prxxO_s
http://www.sixminutessmarter.com/demofiles/webdev/navigation-menus.html# 

https://www.youtube.com/watch?v=T7ayE5AtRUA
http://www.sixminutessmarter.com/demofiles/webdev/cascading-menu-centered.html 

https://www.youtube.com/watch?v=kEi9nXtuRJ8

https://www.youtube.com/watch?v=m90pBb1HYhM

code : https://www.developphp.com/video/JavaScript/Control-Panel-Flyout-Menu-Windows-Animations 

http://codebind.com/tag/css/

http://themes.muffingroup.com/be/splash/

exmp: http://www.first4magnets.com/cylindrical-rod-magnets-c39