var timerInterval = setInterval(drawPlayerRunning, 50);
  clearInterval(timerInterval);

var isIntervalInProgress = false;
setInterval(function()
{
  if ( isIntervalInProgress )
    return false;

  isIntervalInProgress = true;

  drawPlayerRunning();

  isIntervalInProgress = false;

}, 50);

var func = function()
{
  setTimeout(function()
  {
    drawPlayerRunning();
    func();
  }, 50)
}