محاكي Z-index

Red Box Z-index 1

Green Box Z-index 2

Blue Box Z-index 3

Purple Box Z-index 4

Red z-index: 1

Green z-index: 2

Blue z-index: 3

Purple z-index: 4

CSS

.box-red { z-index: 1; }
.box-green { z-index: 2; }
.box-blue { z-index: 3; }
.box-purple { z-index: 4; }