Dynamic Color Shifting with NeoPixels

#include <Adafruit_NeoPixel.h>

#define NUMPIXELS 32
#define PIN 13
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

int offset = 0; // Variable to keep track of the shifting

void setup() {
  pixels.begin();
}

void loop() {
  for (int i = 0; i < NUMPIXELS; i++) {
    // Shift starting color by 'offset'
    int colorIndex = (i + offset) % 5;
    uint32_t color;

    switch (colorIndex) {
      case 0: color = pixels.Color(204, 51, 255); break; // COLOR 1
      case 1: color = pixels.Color(204, 0, 255); break; // COLOR 2
      case 2: color = pixels.Color(102, 0, 255); break; // COLOR 3
      case 3: color = pixels.Color(102, 51, 255); break; // COLOR 4
      case 4: color = pixels.Color(102, 102, 255); break; // COLOR 5
    }

    pixels.setPixelColor(i, color);
  }

  pixels.show();
  delay(50); // Update every 50ms

  // Increment the offset to shift colors in the next loop iteration
  offset = (offset + 1) % 5; // Keep the offset within 0 to 4
}