#conteneur
{
	display: flex;
	flex-wrap: wrap;
	border: 3px solid black;
	height: 250px;
	width: 350px
}
.element:nth-child(1)
{
	order: 3;
}
.element:nth-child(2)
{
	order: 1;
}
.element:nth-child(3)
{
	order: 2;
}