ESP8266 + Blynk + Adafruit DotStar library

#include <Adafruit_DotStar.h>
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

#define NUMPIXELS 60

#define DATAPIN    15 // GPIO15 - MISO
#define CLOCKPIN  14 // GPIO14 - CLK

Adafruit_DotStar strip = Adafruit_DotStar(NUMPIXELS, DATAPIN, CLOCKPIN);
char auth[] = "629c4b81452040xxxxxxxxxxxxxxxxxx";

void setup() {
  Blynk.begin(auth, "YOUR SSID", "YOUR PASS");
  strip.begin();
  strip.show();
}

int      head  = 0, tail = -10, color_r=255, color_g=0, color_b=0; //initially set to show red only
uint32_t color = 0xFF0000;
uint8_t count=0;
BLYNK_WRITE(1) { //in blynk app, large RED slider set to virtual pin 1 with minimum = 0 and maximum = 255
     color_r = param.asInt();
}
BLYNK_WRITE(2) { //in blynk app, large GREEN slider set to virtual pin 2 with minimum = 0 and maximum = 255
     color_g = param.asInt();
}
BLYNK_WRITE(3) { //in blynk app, large BLUE slider set to virtual pin 3 with minimum = 0 and maximum = 255
     color_b = param.asInt();
}
uint32_t ticker=millis();
void loop() {
  Blynk.run(); // Initiates Blynk
  strip.setPixelColor(head, color);
  strip.setPixelColor(tail, 0);
  strip.show();
if (millis()-ticker>20) {//this substitutes for the 20 millisecond delay
ticker= millis();
//  delay(20);
color <<= 8; //shift 8 bits to the left to clear out previous value
color |= color_r;
color <<=8;
color |= color_g;
color <<=8;
color |= color_b;
  if(++head >= NUMPIXELS) {
    count++;
    head = 0;
    //if((color >>= 8) == 0)
  }
  if(++tail >= NUMPIXELS) tail = 0;
 }
}