Instuctions : Move the mouse over the first picture to have it zoomming,
adjust the slidebar to speed the image scrolling when mouse is pressed
on an arrow
TODO :
- open picture on left click
- improve the zoom (better centering, wait a bit before launching the
zoom when mouseover)
- add more images blocks to have a better illusion of rotation or do a
real scrolling
- change the background color to fit the website's one
- sometime, the loading bar is not well positioned