I'm trying to make it where I can draw an square with the values in the global array. I made it work without vertex array before but now I need to save it in array so I can possibly delete a square with just a mouse click. However I can't get the squares to show up on screen, it just appears blank. Any suggestions?

#include <GL/glut.h>
#include <stdlib.h>
#include <math.h>


using namespace std;

struct GLPoint
{
  GLint x;
  GLint y;
};

GLint totalmarbles = 64;
GLPoint midhold[64];
GLint vertices[64];

double dist(GLPoint a, GLPoint b)
{
   double distance = sqrt(pow(a.x - b.x, 2) + pow(a.y - b.y, 2));
   return distance;
}


void init(void) 
{
   glClearColor (1.0, 1.0, 1.0, 0.0);
   glShadeModel (GL_SMOOTH);
}



GLPoint mid(GLPoint A, GLPoint B)
{
   GLPoint midpt = (GLPoint){((A.x + B.x)/2, (A.y + B.y)/2)};
   return midpt;
}

void storemids(int q, GLPoint A)
{ 
   midhold[q] = A;
}

void vertice()
{
  GLint total = 0;
  GLint x = 0; GLint y = 0;
  GLint x1, y1, x2, y2, x3, y3, x4, y4;
  x1 = x; y1 = y;
  x2 = x + 100; y2 = y;
  x3 = x + 100; y3 = y + 100;
  x4 = x; y4 = y + 100;
  /*GLPoint P = (GLPoint){(x1, y1)};
  GLPoint Q = (GLPoint){(x2, y2)};
  GLPoint R = (GLPoint){(x3, y3)};
  GLPoint S = (GLPoint){(x4, y4)};*/
  vertices[total] = x1; vertices[total+1] = y1;
  vertices[total+2] = x2; vertices[total+3] = y2;
  vertices[total+3] = x3; vertices[total+4] = y3;
  vertices[total+5] = x4; vertices[total+6] = y4;
  total += 7;
  while(y < 600)
  {
    while(x <= 700)
    {
      x += 100;
      x1 = x; y1 = y;
      x2 = x + 100; y2 = y;
      x3 = x + 100; y3 = y + 100;
      x4 = x; y4 = y + 100;
      /*GLPoint P = (GLPoint){(x1, y1)};
      GLPoint Q = (GLPoint){(x2, y2)};
      GLPoint R = (GLPoint){(x3, y3)};
      GLPoint S = (GLPoint){(x4, y4)};*/
      vertices[total] = x1; vertices[total+1] = y1;
      vertices[total+2] = x2; vertices[total+3] = y2;
      vertices[total+3] = x3; vertices[total+4] = y3;
      vertices[total+5] = x4; vertices[total+6] = y4;
      total += 7;
     }
    x = 0; y += 75;
    x1 = x; y1 = y;
    x2 = x + 100; y2 = y;
    x3 = x + 100; y3 = y + 100;
    x4 = x; y4 = y + 100;
    /*GLPoint P = (GLPoint){x1, y1};
    GLPoint Q = (GLPoint){x2, y2};
    GLPoint R = (GLPoint){x3, y3};
    GLPoint S = (GLPoint){x4, y4};*/
    vertices[total] = x1; vertices[total+1] = y1;
    vertices[total+2] = x2; vertices[total+3] = y2;
    vertices[total+3] = x3; vertices[total+4] = y3;
    vertices[total+5] = x4; vertices[total+6] = y4;
    total += 7;
    
   }

  while(x <= 700)
   {
     x += 100; y = 700;
     x1 = x; y1 = y;
     x2 = x + 100; y2 = y;
     x3 = x + 100; y3 = y + 100;
     x4 = x; y4 = y + 100;
     /*GLPoint P = (GLPoint){x1, y1};
     GLPoint Q = (GLPoint){x2, y2};
     GLPoint R = (GLPoint){x3, y3};
     GLPoint S = (GLPoint){x4, y4};*/
     vertices[total] = x1; vertices[total+1] = y1;
     vertices[total+2] = x2; vertices[total+3] = y2;
     vertices[total+3] = x3; vertices[total+4] = y3;
     vertices[total+5] = x4; vertices[total+6] = y4;
     total += 7;
   }

}

void drawrectangles()
{
   vertice();
   glEnableClientState(GL_VERTEX_ARRAY);
   glVertexPointer(2, GL_INT, 0, vertices);
   glColor3f(0.0, 0.0, 0.0);
   glPolygonMode(GL_FRONT, GL_LINE);
   glBegin(GL_POLYGON);
   for(int i = 0; i < totalmarbles; i++)
   glArrayElement(vertices[i]);
   glEnd();    
}

void myMouse(int button, int state, int x, int y)
{
  GLPoint click = (GLPoint){x, y};
  double hitbox[totalmarbles];
  for(int i = 0; i < totalmarbles; i++)
  {
    double box = dist(midhold[i], click);
    hitbox[i] = box;
  }

  if(state == GLUT_DOWN)
  {
     if(button == GLUT_LEFT_BUTTON)
    {
      for(int j = 0; j < totalmarbles; j++)
      {
        if(hitbox[j] < 100)
        {
          vertices[63];
          drawrectangles();
        }
    }

    }
  }
  else if(button == GLUT_RIGHT_BUTTON)
   {
     glClear(GL_COLOR_BUFFER_BIT);
     glFlush();
   }
}
  


void display(void)
{
  glFlush();
}


void reshape (int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode (GL_PROJECTION);
   glLoadIdentity ();
   gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
}


int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
   glutInitWindowSize (800, 600); 
   glutInitWindowPosition (100, 100);
   glutCreateWindow (argv[0]);
   glutMouseFunc(myMouse);
   glutDisplayFunc(display);
   glutReshapeFunc(reshape);
   glClearColor (1.0f, 1.0f, 1.0f, 1.0f);
   init ();
   glutMainLoop();
   return 0;
}
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