.bb {
width: 200px;
height: 200px;
margin: auto;
/* background: url("img/Button-White-Large.png") no-repeat 50%/70% rgba(0, 0, 0, 0.1); */
color: #69ca62;
box-shadow: 0 0 2px #237ad4 inset;
background: linear-gradient(#1359df, #1359df) left top,
linear-gradient(#1359df, #1359df) left top,
linear-gradient(#1359df, #1359df) right top,
linear-gradient(#1359df, #1359df) right top,
linear-gradient(#1359df, #1359df) left bottom,
linear-gradient(#1359df, #1359df) left bottom,
linear-gradient(#1359df, #1359df) right bottom,
linear-gradient(#1359df, #1359df) right bottom;
background-repeat: no-repeat;
background-size: 2px 15px, 15px 2px;
}