RGB LED Lamp

int led1 = 9;
int led2 =10;
int led3 =11;

int osvetljaj1 = 0;
int osvetljaj2 = 0;
int osvetljaj3 = 0;

void setup() 
    {
    Serial.begin(9600);
    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    }   
   

void loop() 
    {
    int senzorNivo1 = analogRead(A0);
    int senzorNivo2 = analogRead(A1);
    int senzorNivo3 = analogRead(A2);

    osvetljaj1 =  (senzorNivo1 + 100) /4;  //Zavisi od duzine sprica i duzine potenciometra
    osvetljaj2 =  (senzorNivo2 + 100) /4;
    osvetljaj3 =  (senzorNivo3 + 100) /4;
 
    analogWrite(led1, 255 - osvetljaj1);
    analogWrite(led2, 255 - osvetljaj2);
    analogWrite(led3, 255 - osvetljaj3);
 
    Serial.print(senzorNivo1);
    Serial.print("    ");
    Serial.print(senzorNivo2);
    Serial.print("     ");
    Serial.println(senzorNivo3);
    delay(100);
    }