_r_a_n_g_e Specifies the number of contiguous empty display lists to be
generated.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
ggggllllGGGGeeeennnnLLLLiiiissssttttssss has one argument, _r_a_n_g_e. It returns an integer _n such that
_r_a_n_g_e contiguous empty display lists, named _n, _n+1, ..., _n+_r_a_n_g_e -1, are
created. If _r_a_n_g_e is 0, if there is no group of _r_a_n_g_e contiguous names
available, or if any error is generated, no display lists are generated,
and 0 is returned.
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____VVVVAAAALLLLUUUUEEEE is generated if _r_a_n_g_e is negative.
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllGGGGeeeennnnLLLLiiiissssttttssss is executed between the
execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of ggggllllEEEEnnnndddd.