FastLED - Animation test - Moving blue pixels over white

FastledMovingBluePixels.ino

#include "FastLED.h"

// How many leds in your strip?
#define NUM_LEDS 39 

// For led chips like Neopixels, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806, define both DATA_PIN and CLOCK_PIN
#define DATA_PIN 8
#define CLOCK_PIN 7

// Define the array of leds
CRGB leds[NUM_LEDS];

void setup() { 
  Serial.begin(57600);
  Serial.println("resetting");
  //LEDS.addLeds<WS2812,DATA_PIN,RGB>(leds,NUM_LEDS);
  FastLED.addLeds<WS2801, DATA_PIN, CLOCK_PIN, RGB>(leds, NUM_LEDS);
  LEDS.setBrightness(40);
}

//void fadeall() { for(int i = 0; i < NUM_LEDS; i++); }

void loop() { 
  static uint8_t hue = 0;
  Serial.print(hue);
  // First slide the led in one direction
  for(int i = 0; i < NUM_LEDS; i++) {
    // Set the i'th led to blue 
    leds[i] = CHSV(255, 255, 255);
    // Show the leds
    FastLED.show(); 
    // now that we've shown the leds, reset the i'th led to white
    leds[i] %= 32;
    FastLED.show();
    leds[i] = CHSV(255, 0, 50);
    // fadeall();
    // Wait a little bit before we loop around and do it again
    delay(100);
  }
  Serial.print("x");

}