Condition with counter in timer

So I have been trying to make like a timer type thing to count from 0 to 5 (one number up every sec, like normal timer) then stopping at 5 but It’s not stopping at 5. What did I do wrong?

var licz = 0;

function timer() {
  window.setInterval(
    function() {
      document.getElementById('timer_r').innerHTML = licz;
      licz++;
      if (licz >= 5) {
        window.clearInterval(timer);
      }
    }
    , 1000
  );
}

<input type="button" id="timer" on value="timer" onclick="timer();">
<p>Odliczanie: <span id='timer_r'> _ </span></p>

Answer

What you need to be doing is complete your conditional like:-

        <script>

    var licz = 0;
    function timer() {
    window.setInterval(
        function(){
            document.getElementById('timer_r').innerHTML = licz;
    
    if (licz < 5) {
        licz++;
    } else {
        window.clearInterval(timer);
    }

   
}, 1000);  
}

</script>
<br>    
<input type = "button" id = "timer" on value = "timer" onclick="timer();">
<p>Odliczanie: <span id = 'timer_r'> _ </span></p>