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function draw(matrix) {
const ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, CANVAS_HEIGHT, CANVAS_WIDTH);
matrix.forEach((pixelsRow, rowIndex) => {
const y = rowIndex * PIXEL_RATIO;
pixelsRow.forEach((pixel, pixelIndex) => {
const x = pixelIndex * PIXEL_RATIO;
ctx.fillStyle = COLORS[pixel];
ctx.fillRect(x, y, PIXEL_RATIO, PIXEL_RATIO);
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