Explanation:

The following animation illustrates two consecutive Hadamard transformations which equates to two rotations about the (x+z)⁄√2 axis by π radians.

After the first, the position of the vector lies along the x axis at |+〉 and after the second transformation, the vector is back to where it started, which is what we expect.

In the next section we will go about representing qubit states using mathematics with matrices

credits to: desireevl.com