int slider0 = 0;
int slider1 = 0;
int slider2 = 0;
int slider3 = 0;

void setup() {
  Serial.begin(115200);
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
}

void loop() {
  slider0 = analogRead(A0);
  slider1 = analogRead(A1);
  slider2 = analogRead(A2);
  slider3 = analogRead(A3);

  Serial.print(slider0); Serial.print(", "); Serial.print(slider1); Serial.print(", "); Serial.print(slider2); Serial.print(", "); Serial.println(slider3);
}