Joystick Matrix Sketch

// joystick controls led matrix display//
int we = 0;
int ns = 0;
int z=3;
//Servo servo1;
int led = 13;
long randNumberX;
long randNumberY;

//#include <Servo.h>
#include "LedControl.h"
LedControl lc=LedControl(12,11,10,1);


void setup() {
  Serial.begin(9600);
  pinMode(z, INPUT);
  pinMode(led, OUTPUT);
  lc.shutdown(0,false);// turn off power saving, enables display
  lc.setIntensity(0,8);// sets brightness (0~15 possible values)
  lc.clearDisplay(0);// clear screen
  //servo1.attach(3);
 

}

void loop() {
randNumberX=random(0,8);
randNumberY=random(0,8);

  we = analogRead(A1);   //x
 char x = map(we, 1021, 0, 0, 7); //1021,0,0,7
  //servo1.write(x); //0,1023,0,180
 
  ns = analogRead(A0);   //y
 char y = map(ns, 1021, 0, 7, 0); //1021,0,7,0
 
 
  z = digitalRead(z);    //z
 
  Serial.print("we = ");
  Serial.print(we, DEC);
  Serial.print(", ns = ");
  Serial.print(ns, DEC);
  Serial.print(", x = ");
  //Serial.print(x, DEC);
  Serial.print(", y = ");
// Serial.println(y, DEC);
  Serial.print(", z = ");
  Serial.println(z, DEC);
 
    lc.clearDisplay(0);
 lc.setLed(0,x,y,true); 
  delay(5);

lc.setLed(0,randNumberX,randNumberY,true); 
delay(1000);
lc.setLed(0,randNumberX,randNumberY,false); 
delay(1000);

digitalWrite(13, HIGH);
        delay(1000);
       digitalWrite(13, LOW);
       delay(1000);
}