if (place_meeting(x, y, blockparent) && pressed == 0)
{
    obj_puzzle.buttons += 1
    pressed = 1
    if (!audio_is_playing(snd_switch))
        audio_play_sound(snd_switch, 1, 0)
}
else if ((!(place_meeting(x, y, blockparent))) && pressed == 1)
{
    obj_puzzle.buttons -= 1
    pressed = 0
    if (!audio_is_playing(snd_switch))
        audio_play_sound(snd_switch, 1, 0)
}