#include <Adafruit_NeoPixel.h>

#define NUM_PIXELS 7  // Replace with the number of Neopixels you have
#define PIXEL_PIN 6   // Replace with the pin connected to the Neopixels

Adafruit_NeoPixel pixels(NUM_PIXELS, PIXEL_PIN, NEO_GRB + NEO_KHZ800);
unsigned long previousMillis = 0;
const long interval = 100;  // Adjust the interval to control the speed of the chase effect
int delayTime = 500;  // Initial delay time
int speedIncrement = 50;  // Amount to increment the speed

void setup() {
  pixels.begin();
  pixels.show();  // Initialize all pixels to off
}

void loop() {
  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    
    // Clear all pixels
    for (int i = 0; i < NUM_PIXELS; i++) {
      pixels.setPixelColor(i, 0);
    }
    
    // Set the chase effect
    for (int i = NUM_PIXELS - 1; i >= 0; i--) {
      pixels.setPixelColor(i, pixels.Color(0, 0, 255));  // Blue color
      pixels.show();
      delay(delayTime);  // Use the delayTime variable instead of a fixed delay value
      pixels.setPixelColor(i, 0);  // Clear the previous pixel
    }

    // Increase the speed gradually
    delayTime -= speedIncrement;
    if (delayTime < 0) {
      delayTime = 10;  // Make sure the delayTime doesn't go below 10
    }
  }
}