Radar Scope 1.1 fastled arduino

//----------------------------------------------------
// sprocket2cog 2015 cc
// Radar scope animation code 1.1
// thanks to the arduino and fastled community
//----------------------------------------------------

#include "FastLED.h"
#define DATA_PIN    6
#define CHIPSET     WS2812B
#define COLOR_ORDER GRB
#define NUM_LEDS    64
#define BRIGHTNESS  255
CRGB leds[NUM_LEDS];
const uint8_t MatrixWidth  = 8;
const uint8_t MatrixHeight = 8;
int x=0;
int c0 = 96; //hue value for centre of radar
int c1 = 0;  //hue value for the radar sweep

void setup() {
  FastLED.addLeds<CHIPSET, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS);
  LEDS.setBrightness(BRIGHTNESS);
}

void loop() {
  uint8_t blur = beatsin8(60,30,60); // the variable for the 2d blur effect
  int pulse = beatsin8(6,20,100); // the pulse for fading effect using brightness (BMP,MIN_BRIGHT,MAX_BRIGHT)
  Sweeper(); //call to draw the sweep pixel
  Center();  // call to draw the center pixels, comment out for just the edge sweep
  blur2d( leds, MatrixWidth, MatrixHeight, blur);
  LEDS.setBrightness(pulse); //using the global brightness to create a fading effect, comment out if you want fully lit
  FastLED.show();
  x=x+1; // x=x+2;// use for faster speed
}

void Sweeper(){
   leds[sin8(7-(x))/32+(cos8(7-x)/32)*8]+= CHSV(c1,255,255); // scan pixel -clockwise circle pattern
 //leds[sin8(7-(x*2))/32+(cos8(7-x)/32)*8]+= CHSV(c1,255,255); // scan pixel -figure 8 pattern
 //leds[sin8(x)/32+(cos8(7-x)/32)*8]+= CHSV(c1,255,255); // scan pixel -anticlockwise circle pattern
}

void Center(){
   // the brightness of the center leds fade locally as well
   leds[27] = CHSV(c0,255,sin8(x*2));
   leds[28] = CHSV(c0,255,sin8(x*4));
   leds[35] = CHSV(c0,255,sin8(x*4));
   leds[36] = CHSV(c0,255,sin8(x*2));
}

//setting up to use 2d blur
uint16_t XY( uint8_t x, uint8_t y) { return (y * MatrixWidth) + x; }