Olga27,
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Arc</title>
<script>
window.addEventListener("load", function() {
let canvas = document.getElementById("drawingCanvas");
let context = canvas.getContext("2d");
context.beginPath();
context.arc(75, 75, 5, 0, 2 * Math.PI);
context.stroke();
let length = 15,
obj = { x: 0, y: 0};
let CircleArray = Array(length).fill(Array(length).fill({ ...obj}));
console.log(CircleArray);
})
</script>
</head>
<body>
<canvas id="drawingCanvas" width="500" height="400"></canvas>
</body>
</html>