#include <windows.h>
#include <gl/Gl.h>
#include <gl/Glu.h>
#include <gl/Glut.h>
//<<<< myInit >>>>//
void myInit(void)
{
	glClearColor(1.0,1.0,1.0,0.0);
   glColor3f(0.0f,0.0f,0.0f);
   glPointSize(4.0);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   gluOrtho2D(0.0,640.0,0.0,480.0);
}
//<<<< myDisplay >>>>//
void myDisplay(void)
{
	glClear(GL_COLOR_BUFFER_BIT);
   glBegin(GL_POINTS);
   	glVertex2i(100,50);
		glVertex2i(100,130);
      glVertex2i(150,130);
   glEnd();
   glFlush();
}
//<<<< main >>>>//
void main(int argc, char** argv)
{
	glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
   glutInitWindowSize(640,480);
   glutInitWindowPosition(100,150);
   glutCreateWindow("my first attempt");
   glutDisplayFunc(myDisplay);
   myInit();
   glutMainLoop();
}