function reproduct(){
    var pais = [];
    var sum = 0;
    var probability = 0;
    var sumProb = 0;
    var x =0;
    for(var i = 0; i < joaninhas.length; i++){//for all members of population
        sum += joaninhas[i].score;//sum += fitness of this individual
    }// end for

    for(var i = 0; i < joaninhas.length; i++){//for all members of population
        probability = sumProb + (joaninhas[i].score/sum)//probability = sum of probabilities + (fitness / sum)
        sumProb += probability;//sum of probabilities += probability
    }//end for

    while(){//loop until new population is full
        x = 0;
        while(x < 2){//do this twice
            number = random(0,1);//number = Random between 0 and 1
            for(var i = 0; i < joaninhas.length; i++){//for all members of population
                if(number > probability && number < joaninhas[i+1].score){//if number > probability but less than next probability
                    pais[x] = joaninhas[i];//then you have been selected
                }
            }//end for
            x++;
        }//end
    //create offspring
        break;
    }//end loop
}