SSD1306 OLED - sample code isn't working

yes, I found it myself Gordon ;) just wanted to post I found solution ;)
my code looks now that, and is working now ;)

function OLED(){
clearWatch();

I2C1.setup({scl:B6,sda:B7});
var g = require("SSD1306").connect(I2C1);
g.clear();
  g.flip();

pinMode(B15, 'input_pulldown');

//Button tests
var BTN22 = B15;
var screen = 0;
var battery; // = analogRead(A5)*2*3.3;
var analogSample;

function screens(){
  g.clear();
  g.setFontVector(15);
  g.drawString("one",25,20);
  g.flip();
}

function screens2(){
  analogSample = analogRead(A2);
 g.clear();
 g.setFontVector(15);
 g.drawString("OLED OFF?");
 g.setFontVector(10);
 g.drawString(analogSample,60,50);
 g.flip();
}

function screens3(){
  battery = analogRead(A5);
 g.clear();
 g.setFontVector(20);
 g.drawString("" + battery.toFixed(2),20,20);
 g.flip();
}


setWatch(function(e) {
    screen++;
    console.log(screen);
    clearInterval();
    if(screen === 0) screens();
  if(screen === 1) setInterval(screens2,200);
  if(screen === 2) setInterval(screens3,500);
  if(screen >= 2) screen = 0;

  
},BTN22, {repeat: true, edge: 'rising', debounce:150});

}
           
OLED();

@bigplik

took a copy of your code

got syntax error on first line: "Unmatched '{' ." where does function OLED end ?

ups, to slow, you alread found it by yourself ;-)

found another issue,
if I want to just read analog values there clearInterval is ok, but if I want to measure something continuously, like time, stopwatch etc. then every time I swap between my screens I clear interval and will stop time or stopwatch which I don't want,
any solution?
or maybe there is some already written stopwatch code here?

When you do setInterval or setTimeout they return a value. Pass that value to clearInterval and it will only clear that one.

@DrAzzy ,what is the proper code form to stop interval that way you said?
I tried

clearInterval(){1}

and it works when I typed it into console,
but when I placed that form into my code into if statement
WebIDE shows errors,
I used then clearInterval(1); instead but it isn't work

DrAzzy means when you set your interval you assign it to a global variable. For example

var state, interval;
function toggleLed(){
  digitalWrite(LED1,state=!state);
}

setWatch(function() {interval=setInterval(toggleLed,500);},BTN, {repeat: true, edge: 'rising', debounce:5});

You would call clearInterval(interval) to stop only this interval.

@Ducky thanks! I just edited your post above to change var interval=setInterval to interval=setInterval though - as using var would create a local variable rather than actually assigning to the global interval.