void example1(){

  //coordiantes of first pavelabel
  float x1_1=0.2;
  float x2_1=0.3;

  float y1_1=0.2;
  float y2_1=0.3;
  

  //coordinates of second pavelabel
  float x1_2=0.7;
  float x2_2=0.8;

  float y1_2=0.7;
  float y2_2=0.8;
  

  //create and draw the pavelabels
  TPaveLabel *label1 = new TPaveLabel(x1_1, y1_1, x2_1, y2_1, "label 1");
  TPaveLabel *label2 = new TPaveLabel(x1_2, y1_2, x2_2, y2_2, "second label");


  label1->Draw();
  label2->Draw();

  // draw a line connecting them
  TLine *line = new TLine(x2_1, y2_1, x1_2, y1_2);
  line->Draw();

}

void example2(){
  //coordinates of first text box
   float x_1=0.2;
   float y_1=0.2;

   //coordinates of second text box
   float x_2=0.7;
   float y_2=0.7;

   TText *text1 = new TText(x_1, y_1, "label 1");
   TText *text2 = new TText(x_2, y_2, "second label");
   
   //draw them
   text1->Draw();
   text2->Draw();

   // guess at size of box
   TBox *box1 = new TBox(x_1, y_1, x_1+0.1, y_1+0.1);
   box1->SetFillStyle(0);
   box1->Draw();

   TBox *box2 = new TBox(x_2, y_2, x_2+0.1, y_2+0.1);
   box2->SetFillStyle(0);
   box2->Draw();

   //connect them
   TLine *line = new TLine(x_1+0.1, y_1+0.1, x_2, y_2);
   line->Draw();
}