How does water h2o and hydrogen peroxide h2o2 illustrate the law of multiple proportions?

Law of multiple proportions: statement that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers

H2O has a H:O proportion of 2:1

while H2O2 has a H:O proportion of 2:2

different proportions, same elements