<!-- sample from https://particles.matteobruni.it/#background -->
<!-- tsParticles container -->
<div id="tsparticles" style="background: url('https://particles.js.org/images/background3.jpg'); background-position:cover;">
</div>

/* ---- reset ---- */
body {
  margin: 0;
  font: normal 75% Arial, Helvetica, sans-serif;
}

canvas {
  display: block;
  vertical-align: bottom;
}
/* ---- tsparticles container ---- */
#tsparticles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #323031;
  background-image: url("");
  background-repeat: no-repeat;
  background-size: cover;
}

tsParticles.load("tsparticles", {
  fpsLimit: 60,
  particles: {
    number: {
      value: 200,
      limit: 300,
      density: {
        enable: true,
        value_area: 800
      }
    },
    color: {
      value: "#ffffff"
    },
    shape: {
      type: "circle",
      stroke: {
        width: 0,
        color: "#000000"
      },
      polygon: {
        nb_sides: 5
      },
      image: {
        src: "images/github.svg",
        width: 100,
        height: 100
      }
    },
    opacity: {
      value: 0.5,
      random: true,
      anim: {
        enable: true,
        speed: 1,
        opacity_min: 0.5,
        sync: false
      }
    },
    size: {
      value: 30,
      random: true,
      anim: {
        enable: true,
        speed: 10,
        size_min: 10,
        sync: false
      }
    },
    line_linked: {
      enable: true,
      distance: 100,
      color: "#ffffff",
      opacity: 1,
      width: 1
    },
    move: {
      enable: true,
      speed: 2,
      direction: "none",
      random: false,
      straight: false,
      out_mode: "out",
      attract: {
        enable: false,
        rotateX: 600,
        rotateY: 1200
      }
    }
  },
  interactivity: {
    detect_on: "canvas",
    events: {
      onHover: {
        enable: true,
        mode: "bubble",
        parallax: {
          enable: false,
          force: 60,
          smooth: 10
        }
      },
      onClick: {
        enable: true,
        mode: "push"
      },
      resize: true
    },
    modes: {
      grab: {
        distance: 400,
        lineLinked: {
          opacity: 1
        }
      },
      bubble: {
        distance: 400,
        size: 100,
        duration: 2,
        opacity: 1,
        speed: 2
      },
      repulse: {
        distance: 200
      },
      push: {
        particles_nb: 4
      },
      remove: {
        particles_nb: 2
      }
    }
  },
  backgroundMask: {
    enable: true,
    cover: {
      color: {
        value: {
          r: 0,
          g: 0,
          b: 0
        }
      }
    }
  },
  retina_detect: true,
  fps_limit: 30
});