.zone{
	display: inline-block;
	vertical-align: top;	
	width: 200px;
	height: 200px;
	border: solid 1px;
	border-color: black;
}
.item{
	display: inline-block;
	vertical-align: top;	
	width: 200px;
	height: 200px;
	border: solid 1px;
}	
.item:hover{
	cursor:grab;
}
.zone .item {
	color: yellow;
}
.center {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200px;
  border: 3px solid green;
}
.hide {
	display: none;	
}
.show {
	display: inline-block;	
}