drawing a box

OpenGL OpenGL: Basic Coding
1

Hi is there a more efficient way of generating a box - also can a file format be written to generate these boxes ?

glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);
glBegin(GL_POLYGON);
	glNormal3d( 0.0, 0.1, 0.0);
	glVertex3d(  x1,  y1, -z1);//FRIGHT
	glVertex3d( -x1,  y1, -z1);//FLEFT
	glVertex3d( -x1,  y1,  z1);//NLEFT
	glVertex3d(  x1,  y1,  z1);//NRIGHT
glEnd();     

//Front face of cube

glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, PurpleSurface);															
glBegin(GL_POLYGON);
	glNormal3d( 0.0, 0.0, 0.3);
	glVertex3d( -x2,  y1,  z1);//top right corner
	glVertex3d( -x1,  y1,  z1);//top left corner
	glVertex3d( -x1, -y1,  z1);//bottom left corner
	glVertex3d( -x2, -y1,  z1);//bottom right corner
glEnd();



glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);															
glBegin(GL_POLYGON);
	glNormal3d( 0.0, 0.0,  0.2);
	glVertex3d( -x3,  y1,  z1);	//top right corner
	glVertex3d( -x2,  y1,  z1); //top left corner
	glVertex3d( -x2, -y1,  z1); //bottom left corner
	glVertex3d( -x3, -y1,  z1); //bottom right corner
glEnd();
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, PurpleSurface);															
glBegin(GL_POLYGON);
	glNormal3d( 0.0, 0.0,  0.3);
	glVertex3d(  x3,  y1,  z1);//top right corner
	glVertex3d( -x3,  y1,  z1);//top left corner
	glVertex3d( -x3, -y1,  z1);//bottom left corner
	glVertex3d(  x3, -y1,  z1);//bottom right corner
glEnd();

glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);															
glBegin(GL_POLYGON);
	glNormal3d( 0.0, 0.0, 0.2);
	glVertex3d( x2,  y1,  z1); //top right corner
	glVertex3d( x3,  y1,  z1); //top left corner
	glVertex3d( x3, -y1,  z1); //bottom left corner
	glVertex3d( x2, -y1,  z1); //bottom right corner
glEnd();


glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, PurpleSurface);															
glBegin(GL_POLYGON);
	glNormal3d( 0.0, 0.0,  0.3);
	glVertex3d(  x1,  y1,  z1);//top right corner
	glVertex3d(  x2,  y1,  z1);//top left corner
	glVertex3d(  x2, -y1,  z1);//bottom left corner
	glVertex3d(  x1, -y1,  z1);//bottom right corner
glEnd();

glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);
//horizontal right face
glBegin(GL_POLYGON);
     glNormal3d(  0.3, 0.0,  0.0);
     glVertex3d(  x1,  y1, -z1);//FTOP
	 glVertex3d(  x1,  y1,  z1);//NTOP
	 glVertex3d(  x1, -y1,  z1);//NBOTTOM 
	 glVertex3d(  x1, -y1, -z1);//FBOTTOM
	 
glEnd();

//Back face of cube
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);
glBegin(GL_POLYGON);
	glNormal3d(  0.0, 0.0, -0.3);
	glVertex3d( -x1,  y1, -z1);//top left
	glVertex3d(  x1,  y1, -z1);//top right
	glVertex3d(  x1, -y1, -z1);//bottom right
	glVertex3d( -x1, -y1, -z1);//bottom left
glEnd();

//horizontal left face
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);
glBegin(GL_POLYGON);
     glNormal3d( -0.4, 0.0, 0.0);
	 glVertex3d( -x1,  y1,  z1);//NTOP
	 glVertex3d( -x1,  y1, -z1);//FTOP
	 glVertex3d( -x1, -y1, -z1);//FBOTTOM
	 glVertex3d( -x1, -y1,  z1);//NBOTTOM
glEnd();
//Bottom face of cube
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, BlueSurface);
glBegin(GL_POLYGON);
	glNormal3d( 0.0, -0.1, 0.0);
	glVertex3d(  x1, -y1,  z1);//NRIGHT
	glVertex3d( -x1, -y1,  z1);//NLEFT
	glVertex3d( -x1, -y1, -z1);//FLEFT
	glVertex3d(  x1, -y1, -z1);//FRIGHT
glEnd();

thanx