Trickle show images

trickle.scss

// image
.trickle-div {
    transition: all;
    transition-delay: var(--delay1);
    transition-duration: 300ms;
}

// itemcontainer
@for $i from 1 to 100 {
    .trickle > *:nth-child(#{$i}) { 
        --delay1: #{$i * 5ms};
    }
}