canvas {
	border: solid 1px green;
}
.debug_info {
	border: solid 1px gray;
  margin: 10px 0;
  padding: 0 10px;
  max-height:100px;
  width:380px;
  overflow:auto;
}
.debug_info p {
  margin:0;
  padding:0;
}
thead {
  display:block;
  width:100%;
}
th,td {
  width:60px;
  padding:0;
  margin:0;
}
#draw_history {
  display:inline-block;
  max-height:120px;
  overflow-y:scroll;
}
.demo {
	float:left;
	margin-right:10px;
	border: solid 1px green;
}