repeat
    print("\n\n\nTapez une touche pour continuer")
    io.read() <-- what is this?
    term.clear()
    print("==========Menu==========\n1) Afficher les ids des satellites\n2) Ajouter un id de satellite\n3) Quitter")
    local choice = term.read() <-- THIS should be your io.read(), not above.
    local validChoices = {"1", "2", "3"}
    if isValidChoice(choice, validChoices) then
        if choice == "1" then
            display()
            os.sleep(0.1)
        end
    end
until choice == "3"