Starry sky animation

<!-- particles.js container --> 
<div id="particles-js"></div>

<!-- particles.js lib - https://github.com/VincentGarreau/particles.js --> 
<script src="https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script>

/* ---- reset ---- */

body {
  margin: 0;
  background-color: #17182f;
}

canvas {
  display: block;
  vertical-align: bottom;
}


/* ---- particles.js container ---- */

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
}

particlesJS("particles-js", {
  "particles": {
    "number": {
      "value": 355,
      "density": {
        "enable": true,
        "value_area": 789.1476416322727
      }
    },
    "color": {
      "value": "#ffffff"
    },
    "shape": {
      "type": "circle",
      "stroke": {
        "width": 0,
        "color": "#000000"
      },
      "polygon": {
        "nb_sides": 5
      },
      "image": {
        "src": "img/github.svg",
        "width": 100,
        "height": 100
      }
    },
    "opacity": {
      "value": 0.48927153781200905,
      "random": false,
      "anim": {
        "enable": true,
        "speed": 0.2,
        "opacity_min": 0,
        "sync": false
      }
    },
    "size": {
      "value": 2,
      "random": true,
      "anim": {
        "enable": true,
        "speed": 2,
        "size_min": 0,
        "sync": false
      }
    },
    "line_linked": {
      "enable": false,
      "distance": 150,
      "color": "#ffffff",
      "opacity": 0.4,
      "width": 1
    },
    "move": {
      "enable": true,
      "speed": 0.2,
      "direction": "none",
      "random": true,
      "straight": false,
      "out_mode": "out",
      "bounce": false,
      "attract": {
        "enable": false,
        "rotateX": 600,
        "rotateY": 1200
      }
    }
  },
  "interactivity": {
    "detect_on": "canvas",
    "events": {
      "onhover": {
        "enable": true,
        "mode": "bubble"
      },
      "onclick": {
        "enable": true,
        "mode": "push"
      },
      "resize": true
    },
    "modes": {
      "grab": {
        "distance": 400,
        "line_linked": {
          "opacity": 1
        }
      },
      "bubble": {
        "distance": 83.91608391608392,
        "size": 1,
        "duration": 3,
        "opacity": 1,
        "speed": 3
      },
      "repulse": {
        "distance": 200,
        "duration": 0.4
      },
      "push": {
        "particles_nb": 4
      },
      "remove": {
        "particles_nb": 2
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  "retina_detect": true
});