tupSlider("#fRotation", {value: radToDeg(fRotationRadians), slide: updateRotation, min: -360, max: 360});
  webglLessonsUI.setupSlider("#lightRotationX", {value: lightRotationX, slide: updatelightRotationX, min: -2, max: 2, precision: 2, step: 0.001});
  webglLessonsUI.setupSlider("#lightRotationY", {value: lightRotationY, slide: updatelightRotationY, min: -2, max: 2, precision: 2, step: 0.001});
  webglLessonsUI.setupSlider("#innerLimit", {value: radToDeg(innerLimit), slide: updateInnerLimit, min: 0, max: 