    let normalize = 1.0 / (red * red + green * green);
                        red *= normalize;
                        green *= normalize;
                        coverage.innerText = Math.round(file.p * 100);
                        coverage.style = "background-color: RGB(" + 255 * red + "," + 255 * green + ", 0" + ")";
                    } else {
                        coverage.innerText = "--";
                        coverage.style = "background-color: RGB(180,180,180)";
                    }
      