HTML/CSS - Rhumb Line Online Editor and JavaScript Compiler

html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Rhumb Line</title>
    
    <style>
        body {
            margin: 0;
            overflow: hidden;
            background: black;
        }
        canvas {
            display: block;
        }
    </style>
    
</head>
<body>
    <canvas id="canvas"></canvas>
    <script>
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');
        

css

BROWSER

Console