I am creating a simple Game, like minecraft.

But i stumbled upon a problem. Its not optimized!

Its giving me 10 FPS, even tho i am drawing only a few of cubes

Screenshot:

I tried making render distance (50) less, but that is not enough

Or i tried setting clock.tick(90) to clock.tick(200), but that didnt also work.

Anyways, Theres my code: (if not enough, i could give pastebin link)

# ...

def Cube(x, y, z, r, g, b, distancefromcamera):
    if distancefromcamera > 50:
        return
    
    glPushMatrix()
    glTranslatef(x, y, z)
    glBegin(GL_QUADS)
    glColor3f(r,g,b)
    for surface in surfaces:
        for vertex in surface:
            glVertex3fv(mulsequence(vertices[vertex], cubesize/2))
    glEnd()
    glPopMatrix()

# ...

def main():
    
    # ...

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE or event.key == pygame.K_RETURN:
                    pygame.quit()
                    quit()
        glLoadIdentity()
        mouseMove = pygame.mouse.get_rel()
        pygame.mouse.set_pos((displayCenter[0],displayCenter[1]))
        up_down_angle += mouseMove[1]*0.25
        glRotatef(up_down_angle, 1.0, 0.0, 0.0)

        fps = str(int(clock.get_fps()))
        pygame.display.set_caption(fps)
        
        pressedkeys = pygame.key.get_pressed()
        glPushMatrix()
        glLoadIdentity()

        # ...

        glRotatef(mouseMove[0]*0.25, 0.0, 1.0, 0.0)
        rotationx += mouseMove[0]*0.25

        glMultMatrixf(viewMatrix)
        viewMatrix = glGetFloatv(GL_MODELVIEW_MATRIX)

        # apply view matrix
        glPopMatrix()
        glMultMatrixf(viewMatrix)
        
        glPushMatrix()

        glLightfv(GL_LIGHT0, GL_POSITION, [1, -1, 1, 0])

        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)

        
        for i in range(100):
            for l in range(100):
                distancefromcamera = (i-posx-50)**2 + (l-posz-50)**2
                Cube(i-50,0,l-50,0.5,0.9,0.2, distancefromcamera)


        glPopMatrix()

        pygame.display.flip()
        clock.tick(90)


main()