foot mark

when the sea is calm my foot marks on the sandy beach is straight and forward as the waves dont interupt me. when the waves are going in and out my foot marks on the sand are curved.i like my foot marks on the sand , i like to step on previous foot marks for persons who came before me on the beach in the early morning , i can search for these persons and they can be my friends as we both love the sea in the early morning.