Neo matrix ne fonctionne pas mais pas d'erreur

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oui je suis sur le pin 3 mais sur mon autre bout de code je n'ai pas besoin de preciser D3 dans le code avec la lib FastLED_NeoMatrix.h

#include <Adafruit_GFX.h>
#include <FastLED_NeoMatrix.h>
#include <FastLED.h>

#define PIN 3
#define BRIGHTNESS 50

#define mw 40
#define mh 8
#define NUMMATRIX (mw*mh)
CRGB leds[NUMMATRIX];
// Define matrix width and height.
//FastLED_NeoMatrix *matrix = new FastLED_NeoMatrix(leds, mw, mh, 
//  NEO_MATRIX_TOP     + NEO_MATRIX_LEFT +
//    NEO_MATRIX_ROWS + NEO_MATRIX_PROGRESSIVE);

FastLED_NeoMatrix *matrix = new FastLED_NeoMatrix(leds, mw, mh, 
  NEO_MATRIX_TOP     + NEO_MATRIX_LEFT +
    NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE);
    
// This could also be defined as matrix->color(255,0,0) but those defines
// are meant to work for adafruit_gfx backends that are lacking color()
#define LED_BLACK    0
uint32_t color_red=matrix->Color(255, 0, 0);
uint32_t color_white=matrix->Color(255, 255, 255);
uint32_t color_black=matrix->Color(0, 0, 0);

const byte YtLogoColors[3][3] = {{0, 0, 0}, {255, 0, 0}, {255, 255, 255}};
const byte YtLogo[8][10] = 
{
  {0, 1, 1, 1, 1, 1, 1, 1, 1, 0},
  {1, 1, 1, 1, 2, 1, 1, 1, 1, 1},
  {1, 1, 1, 1, 2, 2, 1, 1, 1, 1},
  {1, 1, 1, 1, 2, 2, 2, 1, 1, 1},
  {1, 1, 1, 1, 2, 2, 2, 1, 1, 1},
  {1, 1, 1, 1, 2, 2, 1, 1, 1, 1},
  {1, 1, 1, 1, 2, 1, 1, 1, 1, 1},
  {0, 1, 1, 1, 1, 1, 1, 1, 1, 0}
};

void scrolling_line(){
      matrix->clear();
      
        for (int i = 3;i<mw;i++){
          
         for (int y = 2;y<mh;y++){
            //matrix->drawLine(y,z,y,i,color_red);
            // matrix->drawLine(2,1,2,5,color_red);
             matrix->drawLine(8,7,0,0,color_red);
            matrix->show();
            delay(50);
          }
        }
      
}


void setup() {
  // put your setup code here, to run once:
// Time for serial port to work?
    delay(1000);
    Serial.begin(115200);
    Serial.print("Init on pin: ");
    Serial.println(PIN);
    Serial.print("Matrix Size: ");
    Serial.print(mw);
    Serial.print(" ");
    Serial.print(mh);
    Serial.print(" ");
    //Serial.println(NUMMATRIX);
    FastLED.addLeds<NEOPIXEL,PIN>(  leds, NUMMATRIX  ).setCorrection(TypicalLEDStrip);
    //Serial.print("Setup serial: ");
    //Serial.println(NUMMATRIX);
    matrix->begin();
    matrix->setTextWrap(false);
    matrix->setBrightness(BRIGHTNESS);
    matrix->print("Hello");
    
  }

void loop() {
  // put your main code here, to run repeatedly:
scrolling_line();
}