var canvas = document.querySelector('canvas');
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;

var c = canvas.getContext('2d');


  c.beginPath();
  c.arc(200, 200, 30, 0, Math.PI * 2, false);
  c.strokeStyle = 'blue';
  c.stroke();

function animate() {
  requestAnimationFrame(animate);
  console.log('hallo');
}

console.log('hallo');