#cube{height:6.5em;width:6em;float:left;margin-right:15px}#cube div{width:0;height:0;border-style:solid;overflow:hidden}#cube .c1{border-color:transparent transparent blue transparent;border-width:0 3em 1.5em 3em}#cube .c2{border-color:blue lime blue red;border-width:1.5em 3em 0 3em;height:2em}#cube .c3{border-color:transparent red transparent transparent;border-width:0 3em 1.5em 0;float:left}#cube .c4{border-color:transparent transparent transparent lime;border-width:0 0 1.5em 3em;float:left}