div {
width: 40px;
height: 40px;
border-width: 40px;
border-style: solid;
border-color: red green blue brown;
}
div {
width: 0;
height: 0;
border-width: 40px;
border-style: solid;
border-color: red green blue brown;
}
div {
width: 0;
height: 0;
border-width: 40px;
border-style: solid;
border-color: red transparent transparent transparent;
}
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