Hey Muriel
(1)Whoever knowingly mutilates, defaces, physically defiles, burns, maintains on the floor or ground, or tramples upon any flag of the United States shall be fined under this title or imprisoned for not more than one year, or both.
https://www.law.cornell.edu/uscode/text/18/700#:~:text=(a)%20read%20as%20follows%3A,one%20year%2C%20or%20both.%E2%80%9D