#b1 { background-image:url(sites/default/files/WebsiteContent/a.jpg);  background-size: cover; transition: .9s ease-in }
#b2 { background-image:url(sites/default/files/WebsiteContent/a6.jpg);  background-size: cover; transition: .9s ease-in }
#b3 { background-image:url(sites/default/files/WebsiteContent/a2.jpg);  background-size: cover; transition: .9s ease-in }