def voxel
x = 0
y = 0
z = 0

glColor3f(0, 1, 0);
glPushMatrix();
while x < 10 and y < 10
glTranslatef(x*1,y*1,0);
glutSolidCube(1);
x += 1
y += 1
z += 1
end
glPopMatrix();
end