var generate = function(numRows) {
    var previousLine = [];    //array to hold each line of the triangle
    var overallArr = [];      //final array that has all the lines of the triangle in it
    if(overallArr === undefined){         //if the final array is undefined
        previousLine.push(1);             //make the first nested array equal to one to start the triangle
        overallArr.push(previousLine);    //put the first line of triangle into the overall array
        numRows--; //decrement numRows left
    }
    if(numRows === 0){        //if we run out of number of rows
        return overAllArr;     //return overallArr/triangle
    }
    var add = function (rowNumber, previousLine)
        if(n > 0){
            for(var i = 0; i < previousLine.length < i++){    //loop through previous line
            //add the two numbers above (same index + index - 1)
            //push sum into previousLine array
            //once gone through the previousLine array loop
            //push this previousline to the outcome array
            }
        }
};