Meteors with 3 strips

#include <FastLED.h>

#define COLOR_ORDER GRB
#define NUM_STRIPS 3
#define NUM_LEDS_PER_STRIP    15

CRGB leds[NUM_STRIPS][NUM_LEDS_PER_STRIP];
uint8_t  Meteor_position[NUM_LEDS_PER_STRIP];
uint8_t  Meteor_color[NUM_LEDS_PER_STRIP];
uint8_t  Meteor_speed = 1;
uint8_t Meteor_fade = 4;

void setup(){

  delay(3000);

  FastLED.addLeds<WS2811,  2, GRB>(leds[0], NUM_LEDS_PER_STRIP);
  FastLED.addLeds<WS2811, 14, GRB>(leds[1], NUM_LEDS_PER_STRIP);
  FastLED.addLeds<WS2811,  7, GRB>(leds[2], NUM_LEDS_PER_STRIP);


  for (int j=0; j<NUM_LEDS_PER_STRIP; j++){
    Meteor_position[j] = 0;
    for (int i=0; i<NUM_STRIPS; i++){
      leds[i][j] = CRGB(0,0,0);
    }
  }
}

void loop(){

  random16_add_entropy( random());
  for (int column = 0; column < NUM_LEDS_PER_STRIP; column++){
    if (Meteor_position[column] > 0){              // If there is currently a meteor
//in that column, update it's position
      Meteor_position[column] += Meteor_speed;
    }
    else if (random16() < 65){                      // If there is no meteor, give it
//~20% chance of a new meteor starting ! Needs revision for 300 LEDs !
      Meteor_position[column] += Meteor_speed;
      Meteor_color[column] = random8(25);          // Random color selection for a new
//meteor. Will select mostly white colored meteors
    }

    else continue;                                 // No need to update any meteor on
//the current column so continue direct to the next x column

    if (Meteor_position[column] < 48){             // Update pixel only if it is the
//first time through the 8 pixels
      uint8_t pixel_fraction = (Meteor_position[column] & 0x0F) * 16;    // extract
//the 'factional' part of the meteor position
      uint8_t pixel =          (Meteor_position[column] & 0x70) / 16;    // extract
//the raw pixel number from the meteor position

      switch(Meteor_color[column]){
      case 0:
        leds[pixel][column] = CRGB(pixel_fraction,0,0);
        break;
      case 1:
        leds[pixel][column] = CRGB(0,pixel_fraction,0);
        break;
      case 2:
        leds[pixel][column] = CRGB(0,0,pixel_fraction);
        break;
      case 3:
        leds[pixel][column] = CRGB(pixel_fraction,pixel_fraction,0);
        break;
      case 4:
        leds[pixel][column] = CRGB(0,pixel_fraction,pixel_fraction);
        break;
      case 5:
        leds[pixel][column] = CRGB(pixel_fraction,0,pixel_fraction);
        break;
      default:
        leds[pixel][column] = CRGB(pixel_fraction,pixel_fraction,pixel_fraction);
        break;
      }
    }
  }
  for (int i=0; i<NUM_STRIPS; i++){
    for (int j=0; j<NUM_LEDS_PER_STRIP; j++){
      leds[i][j] -= CRGB(Meteor_fade,Meteor_fade,Meteor_fade);
    }
  }
  FastLED.show();
  delay(10);
  }