Project Newbie Help

I’m very new to Arduino, and i’m trying to figure out how to work my project I built. I’m using 4x photo resistors (in a circle), and 1x laser diode. My goal is for the laser to go across the photo resistors in a clockwise, or counter-clockwise motion. When the laser hits them, it will indicate what photo resistor it is on, and send it to turn 90 degrees. I was able to code 1 for testing to do what I want, but having issues when trying to code the others. Any help is appreciated! Below is what I am working on. Trying to work with the second photo resistor.

int sensorValue0;
int sensorValue1;
int sensorValue2;
int sensorValue3;
int laserPin = 12;

int PreviousPC0 = 0;
int PreviousPC1 = 0;

//boolean Sensor1Hit = false;
//boolean Sensor2Hit = false;
//boolean Sensor3Hit = false;
//boolean Sensor4Hit = false;

void setup() {
// initialize the serial communication:
pinMode(laserPin, OUTPUT);
digitalWrite(laserPin, HIGH);
digitalWrite(laserPin, HIGH);
Serial.begin(9600);

PreviousPC0 = analogRead(A0);
PreviousPC1 = analogRead(A1);

//Sensor1Hit = true; //assumption that sensor 1 is starting point
// sensorValue1 = analogRead(A1);
// sensorValue2 = analogRead(A2);
// sensorValue3 = analogRead(A3);

Serial.println(“STARTING”);
}

void loop() {
sensorValue0 = analogRead(A0);
sensorValue1 = analogRead(A1);
sensorValue2 = analogRead(A2);
sensorValue3 = analogRead(A3);

if ( ((sensorValue0 - 100) <= PreviousPC0) && (PreviousPC0 <= (sensorValue0 + 100))) {
// do
Serial.print("SV0: ");
Serial.println(sensorValue0);
Serial.print("PSV0: ");
Serial.println(PreviousPC0);
}
else
{
Serial.println(“ELSE1”);
if (PreviousPC0 > sensorValue0) {
//do nothing
Serial.println(“Off Sensor 1”);
}
else {
// send movement to other program
Serial.println(“ON Sensor 1”);

if ( ((sensorValue1 - 100) <= PreviousPC1) && (PreviousPC1 <= (sensorValue1 + 100))) {
// do
Serial.print("SV1: ");
Serial.println(sensorValue1);
Serial.print("PSV1: ");
Serial.println(PreviousPC1);
}
else
{
Serial.println(“ELSE2”);
if (PreviousPC1 > sensorValue1) {
//do nothing
Serial.println(“Off Sensor 2”);
}
else {
// send movement to other program
Serial.println(“ON Sensor 2”);
}}

//if Sensor4Hit = true {
//send CW
}
//if Sensor2Hit = true {
//send CCW
}
//Sensor1Hit = true;
//Sensor2Hit = false;
//Sensor3Hit = false;
//Sensor4Hit = false;

Serial.print("Photoresistor1: ");
Serial.println(sensorValue0);
Serial.print("Photoresistor2: ");
Serial.println(sensorValue1);
Serial.print("Photoresistor3: ");
Serial.println(sensorValue2);
Serial.print("Photoresistor4: ");
Serial.println(sensorValue3);
PreviousPC0 = sensorValue0;
delay(1500);
}

but having issues when trying to code

And those issues are . . ?

Please remember to use code tags when posting code

When the laser hits them, it will indicate

What will? It is a pronoun with no referent.

what photo resistor it is on, and send it to turn 90 degrees.

What the heck does "send it to turn 90 degrees" mean in the context of a photo resistor? I've never seen a photo resistor that could turn 90 degrees.