No delay

Delay

Negative Delay

Staggered

Staggered w/ Negative Delay

Staggered w/ Alternate Direction

Animate simultaneously with no delay

Animate simultaneously with a delay

Animate simultaneously with a negative delay

Use a variable to create a stagger

Use an offset to make the delays negative so that the elements retain stagger but don't stagger in

Use a negative coefficient to create a stagger in the opposite direction

.block {  animation-delay: 0s;}

.block {  animation-delay: 2s;}

.block {  animation-delay: -0.5s;}

.block {  animation-delay: calc(var(--index) * 0.25s);}

.block {  animation-delay: calc((var(--index) - 5) * 0.25s);}

.block {  animation-delay: calc(var(--index) * -0.25s);}