canvas#canvas
{
   border: 1px dotted #f06;
   margin-left: 100px;
}

div#output
{
   width: 250px;
   height: 150px;
   float: left;
   overflow-x: hidden;
   overflow-y: auto;
   background-color: #000;
   color: #fff;
}

canvas#canvas
{
   border: none;
   margin-left: 100px;
}

div#output
{
   width: 250px;
   height: 150px;
   float: left;
   overflow-x: hidden;
   overflow-y: auto;
   background-color: #000;
   color: #fff;
}

Remove red border from canvas
Remove red border from canvas
