void setup() {
  
  Matrix m1 = new Matrix(3);
  float [] data1 = {1, 2, 3, 0, 1, 1, 2, 1, 1};
  m1.Set(data1);
  m1.Print();

  Matrix m2 = new Matrix(3);
  float [] data2 = {1, 2, 3, 0, 1, 1, 2, 1, 1};
  m2.Set(data2);
  m2.Print();

  Matrix m3 = new Matrix(3);
  m3.Add(m1, m2);
  m3.Print();
}