#include <Adafruit_NeoPixel.h>

#define NUMPIXELS 16

Adafruit_NeoPixel ARTERE(NUMPIXELS, 4, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel VEINE(NUMPIXELS, 5, NEO_GRB + NEO_KHZ800);

void setup() {
  ARTERE.begin();
  VEINE.begin();
}

void loop() {
  
theaterChaseA(VEINE.Color(0, 0, 255),ARTERE.Color(255, 0, 0), 50);  

}

void theaterChaseA(uint32_t color1, uint32_t color2, int wait) {
  for(int a=0; a<10; a++) {  
    for(int b=0; b<4; b++) {  
      ARTERE.clear();
      VEINE.clear();
    
      for(int c=b; c<VEINE.numPixels(); c += 4) {
        ARTERE.setPixelColor(c - (a+b), color2); // Set pixel 'c' to value 'color'
        VEINE.setPixelColor(c, color1);
      }
      ARTERE.show();
      VEINE.show();// Update strip with new contents
        
      delay(90);
    }
  }
}