function randomSign() {
  let a = Math.random();
  if (a < 0.5) {
    return 1;
  }
  return -1;
}

function distance(x1, y1, x2, y2) {
  return Math.sqrt(Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2));
}

let ground = 60;

let x = 50;
let y = 0;

let gravity = 2;

let xVelocity = 0;
let yVelocity = 0;

let bounceY = 0.9;
let bounceX = 0.8;

let scoreLeft = 0;
let scoreRight = 0;

let ellapsedTime = 0;

foo = setInterval(() => {
  ellapsedTime += 60;
  if (ellapsedTime > 10000) {
    sbot.sendArray([
      {
        m: 'userset',
        set: { name: `${botname} [score: ${scoreRight}:${scoreLeft}]` },
      },
    ]);
    ellapsedTime = 0;
  }

  yVelocity += gravity;

  x += xVelocity;
  y += yVelocity;

  if (y > ground) {
    y = ground;
    yVelocity = -bounceY * yVelocity;
    xVelocity = bounceX * xVelocity;
  }

  if (y < 0) {
    y = 0;
    yVelocity = -bounceY * yVelocity;
  }

  if (x < 0) {
    x = 0;
    xVelocity = -bounceX * xVelocity;
    scoreLeft += 1;
  }

  if (x > 100) {
    x = 100;
    xVelocity = -bounceX * xVelocity;
    scoreRight += 1;
  }

  MPP.client.sendArray([{ m: 'm', x: x.toString(), y: y.toString() }]);
}, 60);

MPP.client.on('m', function(msg) {
  if (distance(x, y, msg.x, msg.y) < 10) {
    xVelocity = -Math.sign(msg.x - x) * 5;
    yVelocity = 15;
  }
});