Help Programming Keyes KY-023 Joystick With Arduino Uno

Hello, this is my first time in this thread, but I'll spare the boring details and get right to the point.
I'm trying to program 4 servos using an Arduino Uno. My goal is to control 1 set of servos (2 servos, x and y axis) with the joystick, and control the other set of servos (the other 2) while the joystick is pressed down (the joystick has a button function).

I am using a KEYES KY-023 joystick.

This is the URL to a video tutorial where I got most of the code from: Multiple Servo Motor Control with Joystick and Arduino - YouTube

After attempting to add two additional servos and the button function, I believe my code is incorrect in some way regarding the joystick button, but I'm new to this so I have no clue as to what is incorrect. Here is the code I currently have:

//add the servo library
#include <Servo.h> 

//define our servos 
Servo servo1; 
Servo servo2; 
Servo servo3;
Servo servo4;

//define joystick pins (Analog) 
int joyX = 0; 
int joyY = 1; 
int pinZ = 2;


//variable to read the values from the analog pins 
int joyVal; 
int pinVal;



void setup () 
{ 
  
//attaches our servos on pins PWM 3-5-6-9
servo1.attach(3); 
servo2.attach(5); 
servo3.attach(6);
servo4.attach(9);

} 


void loop () 
{ 
 
  pinVal = analogRead(pinZ);

  if (pinVal = 0)
  {
//read the value of joystick (between 0-1023)
joyVal = analogRead(joyX); 
joyVal = map(joyVal, 0, 1023, 0, 180); //servo value between 0-180 
servo1.write(joyVal); //set the servo position according to the joystick value 

joyVal = analogRead(joyY); 
joyVal = map (joyVal, 0, 1023, 0, 180); 
servo2.write(joyVal); 
  }
else
 {
joyVal = analogRead(joyX); 
joyVal = map(joyVal, 0, 1023, 0, 180); //servo value between 0-180 
servo3.write(joyVal); //set the servo position according to the joystick value 

joyVal = analogRead(joyY); 
joyVal = map (joyVal, 0, 1023, 0, 180); 
servo4.write(joyVal); 
 }
delay(15); 
}

Again I'm new to Arduino and coding in general so any help is appreciated. Thank you!

  if (pinVal = 0)Whoops !

= for assignment
== for comparison