name of the effect to apply
				 */
				function changeEffect( type ) {
					var previousSelector = document.querySelector( '.settings .effects .' + exampleList.className ),
						currentSelector = document.querySelector( '.settings .effects .' + type );

					exampleList.className = type;

					if( previousSelector ) {
						previousSelector.classList.remove( 'active' );
					}

					if( currentSelector ) {
						currentSelector.classList.add( 'active' );
					}
				}

				/**
				 * Updates the list heigh