function drink () {
  open.beer = 0.5;
  beer.drink = 0.5;
}

function it ($user) {
  class.user = buben;
  class.user = beer;
  class.user = linux;
}

if ($user !=$it) {
  it($user);
}

do {
  drink;
while ($it == $pisec_ya_pyaniy);