Boid.prototype.moveCloser = function(boids, distance) {
      if(boids.length < 1) return                                
  
          var avgX = 0;
          var avgY = 0;
          for(var i = 0; i < boids.length; i++) {
                  var boid = boids[i];
                  if(boid.x == this.x && boid.y == this.y) continue;
                  if(this.distance(boid) > distance) continue;
                  
                  avgX += (this.x - boid.x);
                  avgY += (this.y - boid.y);
                  boid = null;
          }
                  
  
          avgX /= boids.length;
          avgY /= boids.length;
  
          distance = Math.sqrt((avgX * avgX) + (avgY * avgY)) * -1.0
          if(distance == 0) return;
          
          this.xVelocity= Math.min(this.xVelocity + (avgX / distance) * 0.15, maxVelocity)
          this.yVelocity = Math.min(this.yVelocity + (avgY / distance) * 0.15, maxVelocity)
  }