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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                <!-- Contents -->
<div id="contents">
  <canvas id="canvas">This browser cannot use a canvas.</canvas>
</div>
              
            
!

CSS

              
                /********************
  Common
********************/

html, body {
  height: 100%;
  width: 100%;
  padding: 0;
  margin: 0;
  background: #74ebd5;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to bottom, #ACB6E5, #74ebd5);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to bottom, #ACB6E5, #74ebd5); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

/********************
  Contents
********************/

canvas#canvas {
  background: #74ebd5;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to bottom, #ACB6E5, #74ebd5);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to bottom, #ACB6E5, #74ebd5); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

              
            
!

JS

              
                (function () {
  'use strict';
  window.addEventListener('load', function() {
    var canvas = document.getElementById('canvas');

    if (!canvas || !canvas.getContext) {
      return false;
    }

    /********************
      Random Number
    ********************/

    function rand(min, max) {
      return Math.floor(Math.random() * (max - min + 1) + min);
    }

    /********************
      Var
    ********************/

    // canvas 
    var ctx = canvas.getContext('2d');
    var X = canvas.width = window.innerWidth;
    var Y = canvas.height = window.innerHeight;

    /********************
      Animation
    ********************/

    window.requestAnimationFrame =
      window.requestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.webkitRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function(cb) {
        setTimeout(cb, 17);
      };

    /********************
      Ground
    ********************/
    
    function drawGround() {
      ctx.beginPath();
      ctx.fillStyle = 'rgb(255, 255, 255)';
      ctx.rect(0, Y - Y * 0.1, X, Y - Y * -0.1);
      ctx.fill();
    }

    /********************
      Moon
    ********************/
    
    var radius = 150;

    if (X < 768) {
      radius = 100;
    }

    function drawMoon() {
      ctx.save();
      ctx.beginPath();
      var col = '255, 255, 255';
      var g = ctx.createRadialGradient(X / 2, Y / 3, radius, X / 3, Y / 3, 0);
      g.addColorStop(0, "rgba(" + col + ", " + (1 * 1) + ")");
      g.addColorStop(0.5, "rgba(" + col + ", " + (1 * 0.2) + ")");
      g.addColorStop(1, "rgba(" + col + ", " + (1 * 0) + ")");
      ctx.fillStyle = g;
      ctx.arc(X / 2, Y / 3, radius, Math.PI * 2, false);
      ctx.fill();
      ctx.restore();
    }

    /********************
      Snow
    ********************/
    
    // var
    var snowNum = 80;
    var backSnowNum = 80;
    var snows = [];
    var backSnows = [];

    if (X < 768) {
      snowNum = 25;
      backSnowNum = 25;
    }
     
    function Snow(ctx, x, y, r, g) {
      this.ctx = ctx;
      this.init(x, y, r, g);
    }

    Snow.prototype.init = function(x, y, r, g) {
      this.x = x;
      this.y = y;
      this.r = r;
      this.c = '255, 255, 255';
      this.v = {
        x: 0,
        y: g
      };
    };

    Snow.prototype.updatePosition = function() {
      this.y += this.v.y;
    };
    
    Snow.prototype.wrapPosition = function() {
      if (this.x - this.r > X) {
        this.x = 0;
      }
      if (this.x + this.r < 0) {
        this.x = X;
      }
      if (this.y - this.r > Y) {
        this.y = 0;
      }
      if (this.y + this.r < 0) {
        this.y = Y;
      }
    };

    Snow.prototype.draw = function() {
      ctx = this.ctx;
      ctx.save();
      ctx.beginPath();
      ctx.fillStyle = this.gradient();
      ctx.arc(this.x, this.y, this.r, Math.PI * 2, false);
      ctx.fill();
      ctx.closePath();
      ctx.restore();
    };

    Snow.prototype.gradient = function () {
      var col = this.c;
      var g = this.ctx.createRadialGradient(this.x, this.y, 0, this.x, this.y, this.r);
      g.addColorStop(0, "rgba(" + col + ", " + (1 * 1) + ")");
      g.addColorStop(0.5, "rgba(" + col + ", " + (1 * 0.2) + ")");
      g.addColorStop(1, "rgba(" + col + ", " + (1 * 0) + ")");
      return g;
    };

    Snow.prototype.resize = function() {
      this.x = rand(0, X);
      this.y = rand(0, Y);
    };

    Snow.prototype.render = function() {
      this.updatePosition();
      this.wrapPosition();
      this.draw();
    };

    for (var i = 0; i < backSnowNum; i++) {
      var snow = new Snow(ctx, rand(0, X), rand(0, Y), rand(1, 5), Math.random());
      backSnows.push(snow);
    }
    
    for (var i = 0; i < snowNum; i++) {
      var snow = new Snow(ctx, rand(0, X), rand(0, Y), rand(10, 15), Math.random() + 0.3);
      snows.push(snow);
    }
    
    /********************
      Tree
    ********************/
        
    // var 
    var treeNum = 30;
    var trees = [];
    var backTreeNum = 16;
    var backTrees = [];
    var branchRad = 30 * Math.PI / 180;

    if (X < 768) {
      treeNum = 15;
      backTreeNum = 8;
    }

    function Tree(ctx, x, y, t, w, c) {
      this.ctx = ctx;
      this.init(x, y, t, w, c);
    }

    Tree.prototype.init = function(x, y, t, w, c) {
      this.ctx = ctx;
      this.x = x;
      this.y = y;
      this.t = t;
      this.w = w;
      this.c = c;
      this.splitNum = rand(10, 30);
      this.tSplit = this.t / this.splitNum;
      this.bSplit = this.w / this.splitNum;
    };

    Tree.prototype.draw = function() {
      ctx = this.ctx;
      ctx.lineCap = 'round';
      ctx.lineWidth = 3;
      ctx.strokeStyle = this.c;
      ctx.beginPath();
      ctx.moveTo(this.x, this.y);
      ctx.lineTo(this.x, this.y - this.t);
      ctx.stroke();
      ctx.lineWidth = 1;
      for (var i = 1, j = this.splitNum; i < this.splitNum; i++, j--) {
        var bX1 = this.x + this.bSplit * j;
        var bX2 = this.x - this.bSplit * j;
        var bY = this.y - (Math.tan(branchRad) * this.bSplit * j) - this.tSplit * i;
        ctx.moveTo(this.x, this.y - this.tSplit * i);
        ctx.lineTo(bX1, bY);
        ctx.stroke();
        ctx.moveTo(this.x, this.y - this.tSplit * i);
        ctx.lineTo(bX2, bY);
        ctx.stroke();
      }
    };

    Tree.prototype.resize = function() {
      this.x = rand(0, X);
      this.y = Y - Y * 0.1;
    };

    Tree.prototype.render = function() {
      this.draw();
    };

    for (var i = 0; i < backTreeNum; i++) {
      var tree = new Tree(ctx, rand(0, X), Y - Y * 0.1, rand(200, 400), rand(50, 100), 'rgb(126, 158, 209)');
      backTrees.push(tree);
    }

    for (var i = 0; i < treeNum; i++) {
      var tree = new Tree(ctx, rand(0, X), Y - Y * 0.1, rand(100, 300), rand(20, 100), 'rgb(255, 255, 255)');
      trees.push(tree);
    }

    /********************
      Render
    ********************/
    
    function render(){
      ctx.clearRect(0, 0, X, Y);
      drawMoon();
      drawGround();
      for (var i = 0; i < backSnows.length; i++) {
        backSnows[i].render();
      }
      for (var i = 0; i < backTrees.length; i++) {
        backTrees[i].render();
      }
      for (var i = 0; i < trees.length; i++) {
        trees[i].render();
      }
      for (var i = 0; i < snows.length; i++) {
        snows[i].render();
      }
      requestAnimationFrame(render);
    }

    render();

    /********************
      Event
    ********************/
    
    // resize
    function onResize() {
      X = canvas.width = window.innerWidth;
      Y = canvas.height = window.innerHeight;
      drawMoon();
      drawGround();
      for (var i = 0; i < backSnows.length; i++) {
        backSnows[i].resize();
      }
      for (var i = 0; i < backTrees.length; i++) {
        backTrees[i].resize();
      }
      for (var i = 0; i < trees.length; i++) {
        trees[i].resize();
      }
      for (var i = 0; i < snows.length; i++) {
        snows[i].resize();
      }
    }

    window.addEventListener('resize', function() {
      onResize();
    });

  });
  // Author
  console.log('File Name / snowyLandscape.js\nCreated Date / January 28, 2020\nAuthor / Toshiya Marukubo\nTwitter / https://twitter.com/toshiyamarukubo');
})();

              
            
!
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