int x_f = screenWidth;
int y_f = 0;
int t_raster = 0;
int x = 0;
int y = 0;
int framerate = 30;
int num_blinks = 3;
int blinktime = 2 * framerate * num_blinks;
int xstep = 50;
int ystep = 50;
int xsize = xstep;
int ysize = ystep;


void proto488flashraster(int x_i, int y_i, int rasterWidth, int rasterHeight){
  //clearDisplay();
  
  color draw_color;
  float draw_size_factor;
  if ((t_raster % (2*framerate) > framerate) || (t_raster % (2*framerate) == 0)) {
    draw_color = color(bgR,bgG,bgB); //Background color
    draw_size_factor = 1.1;
  } else {
    draw_color = color(0,247,255);
    draw_size_factor = 1.0;
  }

  fill(draw_color);
  noStroke();
  rectMode(CENTER);
  rect(convertXCoord(x_f), convertYCoord(y_f), xsize/calibrator.magx * draw_size_factor, ysize/calibrator.magy * draw_size_factor);
  
  t_raster = t_raster + 1;
  x = x + xstep * (t_raster / blinktime);
  x_f = x_i + x;
  y = y + ystep * (x / rasterWidth);
  y_f = y_i + y;
  
  t_raster = t_raster % blinktime;
  x = x % rasterWidth;
  y = y % rasterHeight;
}