Sass Staggered Transition Delay

SassMeister-input.scss

// ----
// Sass (v3.4.14)
// Compass (v1.0.3)
// ----

@mixin staggered_transitions($nth:1,$items:2,$initial:0,$step:.1){
	@for $i from $nth through $items{
		&:nth-of-type(#{$i}){
			transition-delay:#{$initial}s;
		}
		$initial: $initial + $step;
	}
}

.item {
  @include staggered_transitions($items:10,$nth:2,$initial:.3,$step:.2)
}

SassMeister-output.css

.item:nth-of-type(2) {
  transition-delay: 0.3s;
}
.item:nth-of-type(3) {
  transition-delay: 0.5s;
}
.item:nth-of-type(4) {
  transition-delay: 0.7s;
}
.item:nth-of-type(5) {
  transition-delay: 0.9s;
}
.item:nth-of-type(6) {
  transition-delay: 1.1s;
}
.item:nth-of-type(7) {
  transition-delay: 1.3s;
}
.item:nth-of-type(8) {
  transition-delay: 1.5s;
}
.item:nth-of-type(9) {
  transition-delay: 1.7s;
}
.item:nth-of-type(10) {
  transition-delay: 1.9s;
}