[subroutine] The Runner cannot make another run this turn.
There drew he forth the brand Excalibur,
And o'er him, drawing it, the winter moon,
Brightening the skirts of a long cloud, ran forth
And sparkled keen with frost against the hilt:
For all the haft twinkled with diamond sparks,
Myriads of topaz-lights, and jacinth work
Of subtlest jewellery. -Lord Tennyson