The searches for Higgs boson decays to beyond-the-Standard-Model light bosons in four-lepton events with the ATLAS detector (arxiv:1802.03388) is published. Searches are perfomed for exotic decays of the Standard Model Higgs boson with a mass of 125 GeV to one or two new spin-1 particles, H→ZZd nd H→ZdZd, or spin-0 particles, H→Za and H→aa, using proton-proton collision data produced at center of mass energy at 13 TeV and recoreded by the ATLAS detector at the LHC in 2015 and 2016. The data are found to be globally consistent with the Standard-Model.