/********************************** FOUNTIAN **********************************\
| Light shoots up the middle of the cube then once it reaches the top fall     |
| back down on the outside of the cube. After it hits the bottom it changes    |
| color and starts again                                                       |
|                                                                              |
| Written By: Asher Glick                                                      |
| Modified By: S. Dugre to use asynchronous timer                              |
\******************************************************************************/

int fountain_loop;

void fountain() {

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

    currentTimer = 0;
    maxTimer = 0.2 * 1000 * 1000 / 16; // 0.1 seconds
    fountain_loop = 0;
  }

  if ( timerReset) {
    switch (fountain_loop){
      case 0 ... 3:
        //for (int z = 0; z <= 3; z++) {
        drawBoxWalls(color,1,1,fountain_loop,2,2,fountain_loop);
        flushBuffer();
        clearBuffer();
        fountain_loop++;
        timerReset = false;
        break;
      case 4 ... 7: 
    //for (int z = 3; z >= 0; z--) {
        drawBoxWalls(color,0,0,7-fountain_loop,3,3,7-fountain_loop);
        flushBuffer();
        clearBuffer();
        if(fountain_loop >= 7){
          fountain_loop = 0;
          color = nextColor(color);
          }
        else fountain_loop++;
        timerReset = false;
        break;
    }
  }
}