Rainbow Colors with Sparki

RainbowColors.ino

#include <Sparki.h>
int i;
int j;
int x;
int y;
int d;
void setup(){
  j=0;
  x=100;
  y=10;
  d=200;
}

void loop(){
  //red to green 0
  //green to red 1
  // green to blue 2
  // blue to green 3
  // blue to red 4
  // red to blue 5
  for (i = 0; i<= x; i+=5){
    switch(j){
      case 0: sparki.RGB(x, i, 0); break;
      case 1: sparki.RGB(i, x, 0); break;
      case 2: sparki.RGB(0, x, i); break;
      case 3: sparki.RGB(0, i, x); break;
      case 4: sparki.RGB(100, 0, i); break;
      case 5: sparki.RGB(i, 0, x); break;
      default: j = 0; break;
    }    
    delay(d);
  }
  sparki.beep();
  delay(2000);
  sparki.RGB(RGB_OFF);
  delay(200);
  j++;
}