/*********************************** TUNNEL ***********************************\
|
| Modified By: S. Dugre to use asynchronous timer      
\******************************************************************************/


  int color1[]  = {R,R,R,R,B,B,B,B};
  int bright1[] = {2,4,6,8,2,4,6,8};
  int color2[]  = {B,B,B,B,R,R,R,R};
  int bright2[] = {8,6,4,2,8,6,4,2};
  int index[]   = {0,1,2,3,4,5,6,7};
  //int animationSpeed =100;

void tunnel() {

  if (currentState != lastState) {
    
    lastState = currentState;
    Serial.print("New State = ");
    Serial.println(currentState);

    currentTimer = 0;
    maxTimer = 6250; // 100ms (100,000 us / 16 us)
  }

  
  if ( timerReset) {
    drawBoxWalls(color1[index[0]],bright1[index[0]],1,1,0,2,2,0);
    drawBoxWalls(color2[index[0]],bright2[index[0]],1,1,0,2,2,0);
    drawBoxWalls(color1[index[1]],bright1[index[1]],1,1,1,2,2,1);
    drawBoxWalls(color2[index[1]],bright2[index[1]],1,1,1,2,2,1);
    drawBoxWalls(color1[index[2]],bright1[index[2]],1,1,2,2,2,2);
    drawBoxWalls(color2[index[2]],bright2[index[2]],1,1,2,2,2,2);
    drawBoxWalls(color1[index[3]],bright1[index[3]],1,1,3,2,2,3);
    drawBoxWalls(color2[index[3]],bright2[index[3]],1,1,3,2,2,3);
    
    drawBoxWalls(color1[index[4]],bright1[index[4]],0,0,3,3,3,3);
    drawBoxWalls(color2[index[4]],bright2[index[4]],0,0,3,3,3,3);
    drawBoxWalls(color1[index[5]],bright1[index[5]],0,0,2,3,3,2);
    drawBoxWalls(color2[index[5]],bright2[index[5]],0,0,2,3,3,2);
    drawBoxWalls(color1[index[6]],bright1[index[6]],0,0,1,3,3,1);
    drawBoxWalls(color2[index[6]],bright2[index[6]],0,0,1,3,3,1);
    drawBoxWalls(color1[index[7]],bright1[index[7]],0,0,0,3,3,0);
    drawBoxWalls(color2[index[7]],bright2[index[7]],0,0,0,3,3,0);
    
    
    flushBuffer();
    clearBuffer();
    for (int i = 0; i < 8; i++){
      //index[i] = index[i]==7?0:index[i]+1;
      index[i] = (index[i]+1)%8;
    }
    timerReset = false;
    
  }
}