@num: 1;
.mixin() when (@num =< 100) {
#square-@{num} {
animation-delay: @num;
}
@num: @num + 1;
}
.mixin();
@num: 100;
.mixin(@num) when (@num > 0) {
.mixin(@num - 1);
.square-@{num} {
animation-delay: @num;
}
}
.mixin(@num);
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