Thread: glViewport()

I am trying to create 2 viewports on my screen to display two things with different PROJECTION matrices next to eachother. However it only displays the first set of primitives. What is wrong?

Code:

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

int x;

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

void idle(void){
        x++;
        x%=360;
        glutPostRedisplay();
}

void reshape(int w,int h){
        glViewport(0,0,(GLsizei)w,(GLsizei)h);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        gluPerspective(60.0,1.0,1.5,20.0);
        glMatrixMode(GL_MODELVIEW);
}

void display(void){
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glViewport(0,0,(GLsizei)250,(GLsizei)500);
        gluPerspective(60.0,1.0,1.5,20.0);
        glMatrixMode(GL_MODELVIEW);
        glClear(GL_COLOR_BUFFER_BIT);
        glColor3f(1.0,1.0,1.0);
        glLoadIdentity();
        glTranslatef(0.0,0.0,-5.0);
        glutWireSphere(0.3,10,10);
        glRotatef(x,0.0,1.0,0.0);
        glScalef(1.0,2.0,1.0);
        glutWireCube(1.0);
        glutSwapBuffers();
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glViewport(0,0,(GLsizei)250,(GLsizei)500);
        gluPerspective(60.0,1.0,1.5,20.0);
        glMatrixMode(GL_MODELVIEW);
        glClear(GL_COLOR_BUFFER_BIT);
        glColor3f(1.0,1.0,1.0);
        glLoadIdentity();
        glTranslatef(0.0,0.0,-5.0);
        glutWireSphere(0.3,10,10);
        glRotatef(x,0.0,1.0,0.0);
        glScalef(1.0,2.0,1.0);
        glutWireCube(1.0);
        glutSwapBuffers();
}

int main(int argc,char **argv){
        glutInit(&argc,argv);
        glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);
        glutInitWindowSize(500,500);
        glutInitWindowPosition(100,100);
        glutCreateWindow(argv[0]);
        init();
        glutReshapeFunc(reshape);
        glutDisplayFunc(display);
        glutIdleFunc(idle);
        glutMainLoop();
        return 0;
}

i figured it out. I forgot to change the parameters for glViewport() for the second run. So effectively I had two viewports on top of eachother.