arduino i2c guitar effects control receiver

#include <Wire.h>
int ledB[]{13,12,11,10,9,8,7,6,5};
int ledA[]{4,3,2, 1, 0, A0, A1, A2, A3};
int DelayTime = 50;

int comm1 = 4; 
void setup()
{
   for (int i; i<9; i++)
    {pinMode(ledB[i], OUTPUT); pinMode(ledA[i], OUTPUT);}
  for (int i = 0; i <= 8; i++) {digitalWrite(ledB[i], HIGH);}//remove for real world
  for (int i = 0; i <= 8; i++) {digitalWrite(ledA[i], HIGH);}//remove for real world
  Wire.begin(comm1);                
  Wire.onReceive(receiveEvent); 
  Serial.begin(9600);

}
void loop()
{

}
void receiveEvent(int howMany)
{int x = Wire.read(); Serial.println(x); 
 if (x==0)
 {digitalWrite(ledB[0],LOW);}
 else{digitalWrite(ledB[0],HIGH);}
}

//{for (int i=0; i<=9; i++)
 //	{a[i]= Wire.read(); Serial.println(a[i]); (a[i]==1){digitalWrite(ledB[i],LOW);}}