2.
<div class='Caja EjemploLinear3C'></div>
<style type="text/css">
.Caja {
float:left;
width:200px;
height:200px;
margin-right:20px;
border-radius:4px;
border:1px solid #999;
}
.EjemploLinear3C {
background:-webkit-linear-gradient(45deg, rgb(255, 255, 0) 20%, rgb(200, 0, 0) 60%, rgb(0, 150, 0));
background:-moz-linear-gradient(45deg, rgb(255, 255, 0) 20%, rgb(200, 0, 0) 60%, rgb(0, 150, 0));
background:-o-linear-gradient(45deg, rgb(255, 255, 0) 20%, rgb(200, 0, 0) 60%, rgb(0, 150, 0));
background:linear-gradient(45deg, rgb(255, 255, 0) 20%, rgb(200, 0, 0) 60%, rgb(0, 150, 0));
}
</style>
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