//x a range from [-2,1.5] and y a range from [-1.2,1.2]
    bindPrograms(vertexProg, fragment_prog2);   //board 3 mandelbrot
    glNormal3f(0,1,0);
    glBegin(GL_QUADS);
    glTexCoord2f(-2,-1.2);  glVertex3f(7, -4, 1);
    glTexCoord2f(1.5,0);    glVertex3f(1, -4, 1);
    glTexCoord2f(1.5,1.2);  glVertex3f(1, -4, 7);
    glTexCoord2f(0,1.2);    glVertex3f(7, -4, 7);
    glEnd();