snaaaaake.js

(function () {
  var refreshRate = 100;
  var particleLimit = 5;

  var snake = {
    x: (window.innerWidth * Math.random()) - window.pageXOffset,
    y: (window.innerHeight * Math.random()) - window.pageYOffset,
    dx: Math.ceil(Math.random() * 50) - 25,
    dy: Math.ceil(Math.random() * 50) - 25,
    atan2: Math.atan2(this.dx, this.dy),
    body: [],
    update: function () {
      // IIC.setAngle(Math.ceil(Math.random() * 360) * Math.PI / 180);
      if (this.x < 0) {
        this.x = 0;
        this.dx = -this.dx;
      } else if (this.x > window.innerWidth) {
        this.x = window.innerWidth;
        this.dx = -this.dx;
      }
      if (this.y < 0) {
        this.y = 0;
        this.dy = -this.dy;
      } else if (this.y > window.innerHeight) {
        this.y = window.innerHeight;
        this.dy = -this.dy;
      }
      var ddx = (this.dx + ((Math.random() * 10) - 5));
      var ddy = (this.dy + ((Math.random() * 10) - 5));
      this.x = this.x + ddx;
      this.y = this.y + ddy;
      this.atan2 = Math.atan2(ddy, ddx);
      this.body.unshift({
        x: this.x,
        y: this.y,
        atan2: this.atan2
      });
      if (this.body.length > particleLimit) {
        this.body.pop();
      }
      for (var i = this.body.length - 1; i >= 0; --i) {
        IIC.setAngle(this.body[i].atan2);
        mouseClick({
          clientX: this.body[i].x - window.pageXOffset,
          clientY: this.body[i].y - window.pageYOffset,
          button: 0
        });
      }
    }
  }
  setInterval(function () {
    snake.update();
  }, refreshRate);
})();