74hc595 led problem

Hello everyone, is there a way to ensure that the first 2 LEDs remain on after the loop has started and let the others dissolve using the 74hc595? Or a command to exclude these LEDs from doing other operations?

const byte datapin = 2;                 // data pin 14 su arduino pin 2-----su attyni pin 3
 const byte clockpin = 3;                // clock pin 11 su arduino pin 3----su attyni pin 1
 const byte latchpin = 4;                // latch pin 12 su arduino pin 4----su attyni pin 2
 const byte oepin = 5;                   // oe pin 13 su arduino pin 5 ------su attiny pin 0
 byte dato = 0;

 void setup()
 {
  pinMode ( datapin, OUTPUT );          
  pinMode ( clockpin, OUTPUT );
  pinMode ( latchpin, OUTPUT );
  pinMode ( oepin, OUTPUT );
  pinMode (15, OUTPUT);                  //pin 15 su arduino-----------------su attyni pin 4
  digitalWrite(15, HIGH);                //pin 15 su arduino-----------------su attyni pin 4                        
 }
 
 void loop()
 {
 
  dato=0b11000000;
  analogWrite ( oepin, 255 );
  digitalWrite ( latchpin, LOW );
  shiftOut ( datapin, clockpin, LSBFIRST, dato );
  digitalWrite ( latchpin, HIGH );
  delay ( 10 );
  analogWrite ( oepin, 255 );
for  ( byte brightness = 255; brightness > 0; brightness -= 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }
  analogWrite ( oepin, 0 );
for  ( byte brightness = 0; brightness < 255; brightness += 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }                                    

dato=0b11110000;

  analogWrite ( oepin, 255 );
  digitalWrite ( latchpin, LOW );
  shiftOut ( datapin, clockpin, LSBFIRST, dato );
  digitalWrite ( latchpin, HIGH );
  delay ( 10 );
  analogWrite ( oepin, 255 );
for  ( byte brightness = 255; brightness > 0; brightness -= 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }
  analogWrite ( oepin, 0 );
for  ( byte brightness = 0; brightness < 255; brightness += 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }

dato=0b00001100;

  analogWrite ( oepin, 255 );
  digitalWrite ( latchpin, LOW );
  shiftOut ( datapin, clockpin, LSBFIRST, dato );
  digitalWrite ( latchpin, HIGH );
  delay ( 10 );
  analogWrite ( oepin, 255 );
for  ( byte brightness = 255; brightness > 0; brightness -= 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }
  analogWrite ( oepin, 0 );
for  ( byte brightness = 0; brightness < 255; brightness += 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }

dato=0b00000011;

  analogWrite ( oepin, 255 );
  digitalWrite ( latchpin, LOW );
  shiftOut ( datapin, clockpin, LSBFIRST, dato );
  digitalWrite ( latchpin, HIGH );
  delay ( 10 );
  analogWrite ( oepin, 255 );
for  ( byte brightness = 255; brightness > 0; brightness -= 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }
  analogWrite ( oepin, 0 );
for  ( byte brightness = 0; brightness < 255; brightness += 5 )
  {
    analogWrite ( oepin, brightness );
    delay ( 50 );
  }  
 }

Of course you can exclude the first two LEDs from other operations, but the OE setting affects all outputs in the same way.

thanks, now I try to change everything without oe setting