First Program

#include<stdio.h>
#include<GL/glut.h>

void myInit(){
    glClearColor(1.0,1.0,1.0,1.0);
    glColor3f(1.0,0.0,0.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0.0,10.0,0.0,10.0);
    glMatrixMode(GL_MODELVIEW);

}

void display(){
    glClear(GL_COLOR_BUFFER_BIT);
    glPointSize(4.0);
    glBegin(GL_POLYGON);
    glVertex2f(1.0,1.0);
    glColor3f(0.0,1.0,0.0);
    glVertex2f(6.0,1.0);
    glColor3f(0.0,0.0,1.0);
    glVertex2f(6.0,6.0);
    glColor3f(1.0,1.0,0.0);
    glVertex2f(1.0,6.0);
    glEnd();
    glFlush();

}

int main(int argc,char **argv){
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
    glutInitWindowSize(500,500);
    glutInitWindowPosition(100,100);
    glutCreateWindow("My First Example");
    glutDisplayFunc(display);
    myInit();
    glutMainLoop();
    return 0;
}