var turn = 1;
	function slide(){
		var rows = getLastRows(config.rows / 2); // return array[array[5 divs], array[5 divs], array[5 divs]]
		var cols = getColumns(); // return array[array[3 divs], array[ 3 divs], array[ 3 divs], array[ 3 divs], array[ 3 divs]]
		for (var r= 0; r < rows.length; r++){
			for (var i = 0; i < rows[r].length; i++){
				rows[r][i].style.top = "-" + (config.rows * config.height) + "px"; // put the 3 last rows over the first rows
			}
		}
		for (var c = 0; c < cols.length; c++){
			for (var i = 0; i < cols[c].length; i++){
				cols[c][i].style.transform = "translateY(" + turn *  (config.rows / 2) * config.height + "px)"; // now let all columns move downward (works exactly 3 times then ALL moves downward)
			}
		}
		turn++;
	};