//class ClearScreen {
//
//    int timeElapsed, timeCurrent, timeInitial, euglenaCountInitial, euglenaCount, roiCornerX, roiCornerY, roiWidth, roiHeight;
//    float euglenaReduction, targetReduction;
//
//    opencv = new OpenCV(this, roiWidth, roiHeight);
//    opencv.startBackgroundSubtraction(7, 3, .35);
//    roiFrame = new PImage(roiWidth, roiHeight);
//    break;
//
//    /* Identify Euglena in a certain portion of the camera feed */
//    void countEuglena() {
//        roiFrame = get(roiCornerX, roiCornerY, roiWidth, roiHeight); // Get pixels of interest and saves as image for valid image path
//        opencv.loadImage(roiFrame);   // Input proper pixels into cv processing
//        opencv.updateBackground();    //Necessary for background subtraction
//        opencv.useGray();             //Create grayscale image
//        opencv.dilate();              //Clean up image
//        opencv.erode();
//        opencv.blur(3);
//        dst = opencv.getOutput();     //Save computer vision as separate image path
//        contours = opencv.findContours();  //Find outline of moving objects - euglena
//        euglenaCount = contours.size();           // Count number of outlines
//    }
//
//    void reset() {
//        timeInitial = millis();
//        timeElapsed = 0;
//        identifyEuglena();
//        euglenaCountInitial = euglenaCount;
//    }
//
//    ClearScreen(targetReduction){
//        this.reset();
//    }
//
//    void mouseClicked(float x, float y){
//        if (!point1complete){
//            lineinprogress.x1 = x;
//            lineinprogress.y1 = y;
//            point1complete = true;
//        } else {
//            lineinprogress.x2 = x;
//            lineinprogress.y2 = y;
//            lineinprogress.visible = true;
//            lines.add(lineinprogress);
//
//            lineinprogress.draw();
//            this.reset();
//        }
//    }
//}

void clearScreen(){
  clearDisplay();
  arduino.digitalWrite(left, arduino.HIGH);
  leftArrow = 204;
  
  noFill();
  strokeWeight(15);                              // Controls thickness of blue border
  stroke(color(0, 0, 255));
  
  if (t<10000){
    beginShape();                                  // Draws shape
      vertex(convertXCoord(1200), convertYCoord(200));
      vertex(convertXCoord(500), convertYCoord(200));
      vertex(convertXCoord(500), convertYCoord(800));
      vertex(convertXCoord(1200), convertYCoord(800));
    endShape();
    
    t=t+1;
  } else {
    beginShape();
      vertex(convertXCoord(1200), convertYCoord(200));
      vertex(convertXCoord(500), convertYCoord(200));
      vertex(convertXCoord(500), convertYCoord(800));
      vertex(convertXCoord(1200), convertYCoord(800));
    endShape(CLOSE);
  }
}