Division Element #1

position: relative;
z-index: 5;

Division Element #2

position: relative;
z-index: 2;

Division Element #4

position: relative;
z-index: 6;

Division Element #3

position: absolute;
z-index: 4;

Division Element #5

position: relative;
z-index: 1;
​​​​

Division Element #6

position: absolute;
z-index: 3;