Draw_A

#pragma comment (lib,"glut32.lib")

#include<stdio.h>
#include<stdlib.h>
#include<math.h>

#include<GL/glut.h>

#define BLACK 0.9, .9, 0.9

void display(){

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glClearColor(BLACK, 0); //color black
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    gluLookAt( .01,  0, 150,   0,0,0,   0,0,1);

    glMatrixMode(GL_MODELVIEW);


    /****************************
    / Add your objects from here
    ****************************/
    /*
        Task: Draw A
    */

    glColor3f(1, 0, 0);
    glBegin(GL_LINES);{
        float i=50;
        // Vertical Line |
        glVertex3f(-i,0,0);//x
        glVertex3f(i,-50,0);

        // Vertical Line |
        glColor3f(1, 0, 0);
        glVertex3f(i,50,0);//x
        glVertex3f(-i,0,0);

        // Horizontal Line ---
        glColor3f(.75, 0, .55);
        glVertex3f(0,-25,0);//y
        glVertex3f(0,25,0);

    }glEnd();
    glutSwapBuffers();
}

void animate(){
    //codes for any changes in Models, Camera
}

void init(){
    //codes for initialization

    //clear the screen
    glClearColor(BLACK, 0);

    /************************
    / set-up projection here
    ************************/
    //load the PROJECTION matrix
    glMatrixMode(GL_PROJECTION);

    //initialize the matrix
    glLoadIdentity();

    //give PERSPECTIVE parameters
    gluPerspective(70,  1,  0.1,    10000.0);
    //field of view in the Y (vertically)
    //aspect ratio that determines the field of view in the X direction (horizontally)
    //near distance
    //far distance
}

int main(int argc, char **argv){
    glutInit(&argc,argv);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(0, 0);
    glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGB);   //Depth, Double buffer, RGB color

    glutCreateWindow("My OpenGL Program");

    init();

    glEnable(GL_DEPTH_TEST);    //enable Depth Testing

    glutDisplayFunc(display);   //display callback function
    glutIdleFunc(animate);      //what you want to do in the idle time (when no drawing is occuring)

    glutMainLoop();     //The main loop of OpenGL

    return 0;
}