class Waveform{
    public:
        double x[1024];
        double y[1024];
};

class Event : public TObject{
    public:
        Waveform w[2];

    ClassDef(Event, 1);
}

ClassImp(Event)

void task(){
    TFile *outputFile = new TFile("output.root","RECREATE");

    TTree *tree = new TTree("tree","treeliberated tree");

    Int_t nevent = 2;
    Int_t noWaveforms = 2; //it is not used in this case

    Event* e = new Event;

    TRandom3 generator;

    tree -> Branch("waveform", &e);

    for(Int_t iev = 0; iev < nevent; iev++){

        double marInterv = (double) 2*TMath::Pi()/1023;

        for(Int_t i = 0; i<noWaveforms; i++){

            int counter = 0;
            double current = 0;

            double a = generator.Uniform(1,10);

            while(current <= 2*TMath::Pi() + marInterv){
                e->w[i].x[counter] = current;
                e->w[i].y[counter] = a*TMath::Sin(current);
            
                current = current + marInterv;
                counter++;
            }
        }

        tree -> Fill();

    }

    tree -> Write();

    outputFile->Close();

}