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<html><head><style>#div1 { position: relative; height: 200px; width: 200px; margin: 100px; padding: 10px; border: 1px solid black;}#div2 { padding: 50px; position: absolute; border: 1px solid black; background-color: red; transform: rotateY(60deg); transform-style: preserve-3d;}#div3 { padding: 40px; position: absolute; border: 1px solid black; background-color: yellow; transform: rotateY(-60deg);}</style></head><body><h1>The transform-style Property</h1><div id="div1"> <div id="div2">HELLO <div id="div3">YELLOW</div> </div></div></body></html>