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21 lines
283 B
HTML
21 lines
283 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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body {
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margin: 0;
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}
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div:before {
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position: absolute;
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width: 100px;
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height: 100px;
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background-color: red;
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content: "";
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}
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</style>
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</head>
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<body>
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<div>
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</div>
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</body>
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</html>
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