PImage copacabana;

float xpos;
float ypos;
float drag = 50.0;

void setup() 

  {
      size(860,430);
      copacabana = loadImage("copacabana.jpg");
      //XPos indicates the X position of the center of the floating image
      xpos = width/2;
      //yPos indicates the Y position of the center of the floating image
      ypos = height/2;
      frameRate(48);
  }

void draw() 
{ 

   //float difx = mouseX - xpos-copacabana.width/2;
   float distMovx = mouseX - xpos-750;
    if(abs(distMovx) > 1.0) 
       {
       xpos = xpos + distMovx/drag;
       //constrain (value,x minimum boundary,x maximum boundary) ;
       xpos = constrain(xpos, -640, 0);
       }  
  
  
   float distMovy = mouseY - ypos-copacabana.height/2;
   if(abs(distMovy) > 1.0) 
       {
       ypos = ypos + distMovy/drag;
       //constrain (value,y minimum boundary,y maximum boundary) ;
       ypos = constrain(ypos, -570, 0);
       }  
  
  
      // Display the mi image  at the new  position xpos, ypos
      image(copacabana, xpos, ypos);

   //HERE WE CALL THE FUNCTION TO DRAW HORIZONTAL LINES.............................................
   drawMouselines ();
   drawlines ();
   
}

    
    
    
    
//FUNCTION TO DRAW HORIZONTAL LINES.................................................................   
 
void drawlines ()
    {
    int y=0;
    while (y<580)
      {
      line (0,y,860,y); 
      y=y+2;
      }      
    }
    
    
    void drawMouselines ()
    {
     
      line (mouseX,mouseY,mouseX,mouseY+1000); 
      line (mouseX,mouseY,mouseX,mouseY-1000); 
      //line (mouseX,mouseY,mouseX+1000,mouseY); 
      //line (mouseX,mouseY,mouseX-1000,mouseY);     
    }