7; alpha += 0.05) {
                        const grayMask = [0, 0, 0, 255 * alpha];
                        const mixedColors = mixColors(maskColors, grayMask);
                        for (let xDelta = 45; xDelta < backCanvas.width - 50; xDelta++) {
                            const checkColors = backContext.getImageData(maskCenterL + offsetL + xDelta, maskCenterT + offsetT, maskCenterR - maskCenterL, maskCenterB - maskCenterT).data;
                            const diff = colorDiff(mixedColors, checkCol