private IEnumerator SetAcceleration(float time, float coeff)
{
//add acceleration for 3 seconds
moveForwardSpeed *= coeff;
readyForSpeedUp = false;
readyForFillBoost = false;
yield return(new WaitForSeconds(time));
moveForwardSpeed /= coeff;
mainCamera.SetNormalZoom();
readyForFillBoost = true;
}
