quantum mechanics - Visual interpretation, on the Bloch sphere, when Hadamard gate is applied twice

It's known that the Hadamard operation is just a rotation of the sphere about the $\hat{y}$ axis by 90 degrees, followed by a rotation about the $\hat{x}$ axis by 180 degrees.

On the other hand, $H^{2}=I$, where $H$ is the unitary matrix corresponding to the Hadamard gate and $I$ is the identity matrix.

If we do the rotation corresponding to the Hadamard matrix twice, then based on $H^{2}=I$, we would come out to the original situation, right? But, somehow, I can not see that. Could someone shed some light on this problem?