tokens: I 'm stumped at the frag shader last two lines , for bit is the floor of a value 's mod 2 : either 0 or 1 , but what 's rendered does n't show that .
ner_tags: O O O O O O O O O O O O B-Variable O O O O O O O O O O O B-Value O B-Value O O O O O O O O O O