How do I fix this vpython code that just hangs for forever?

I don't know much about vpython and I am just trying a few things in jupyter lab on my ubuntu machine. The book from where I got the snippet shows a cube in 3d with vectors inside it but I see that while running it hangs for forever.

How do I fix it so that it draws the cube with vectors?

from vpython import vec, arrow, mag
o=vec(0,0,0)
x, y, z = vec(1, 0, 0), vec(0, 1, 0), vec(0, 0, 1)
arrows=[(o,x+y),(x,y+z),(o,x+y+z),(o,x),(y,x),(z, x), (y + z, x), (o, y), (x, y), (z, y), (x + z, y),(o, z), (x, z), (y, z), (x + y, z)]
for p, v in arrows:
    arrow(pos=p, axis=v, color=v, shaftwidth=mag(v) / 50)