Controlling 5v led strip from max to arduino

Thanks.

after some time playing with it I come with this simple arduino code:

#include <Adafruit_NeoPixel.h>

// Pin where your LED strip is connected
#define PIN1 6

// Set maximum number of LEDs you want to control
#define MAX_LEDS 300  // Change this to the actual number of LEDs in your strip
int numLeds = MAX_LEDS;  // Set this variable based on how many LEDs you want to use

// Create the NeoPixel strip object
Adafruit_NeoPixel strip1 = Adafruit_NeoPixel(MAX_LEDS, PIN1, NEO_GRB + NEO_KHZ800);

void setup() {
  // Initialize serial communication at 115200 baud
  Serial.begin(115200);

  // Initialize the LED strip
  strip1.begin();
  strip1.show();  // Initialize all pixels to 'off'
}

void loop() {
  // Check if there is data available in the serial buffer
  if (Serial.available() > 0) {
    int r = Serial.parseInt();  // Read red value
    int g = Serial.parseInt();  // Read green value
    int b = Serial.parseInt();  // Read blue value

    // If a complete set of values (r, g, b) is received, apply them to all LEDs
    if (Serial.read() == '\n') {
      // Loop through all the LEDs and set the color
      for (int i = 0; i < numLeds; i++) {
        strip1.setPixelColor(i, r, g, b);  // Set the color for each LED
      }
      strip1.show();  // Update the LED strip to reflect the changes
    }
  }
}

and simple max patch for controlling those leds (on off, random color picker):

Next thing to figure out is how to control those led in sequence running up and down (with same color). Any example to that using Max?