<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<body>
<canvas id="myCanvas" width="1300" height="600"
style="border:1px solid #c3c3c3;">
Your browser does not support the canvas element.
</canvas>
<script>
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var ctx1 = canvas.getContext("2d");
var ctx2 = canvas.getContext("2d");
var ctx3 = canvas.getContext("2d");
var ctx4= canvas.getContext("2d");
var ctx5= canvas.getContext("2d");
var ctx6= canvas.getContext("2d");
var ctx7= canvas.getContext("2d");
ctx.fillStyle = "#FF0000";
var path=new Path2D();
path.moveTo(250,100);
path.lineTo(300,250);
path.lineTo(200,250);
