Staggered exit
a
<-
1
b
<-
2
c
<-
3
d
<-
4
a
<-
1
d
<-
4
Delayed enter
a
<-
1
d
<-
4
a
<-
1
b
<-
2
c
<-
3
d
<-
4
Staggered exit (slide-based)
a
<-
1
b
<-
2
c
<-
3
d
<-
4
Staggered exit (slide-based)
a
<-
1
d
<-
4