As a number code to the protein sequence language, the amino acid numbers (z) derived previously (1, 25, 45, and 17 prime numbers smaller than 64) are used to characterize oligopeptide motifs. The grammatical rule of this language is expressed with two theorems governing the collective properties of oligopeptides. This numeric representation contrasts particular sequence patterns. The language's equivalent forms range from simple repeating phrases (like in baby talk) to elegant and sophisticated seven-word poems (like those of Li Bai). Sequence examples are given for frequently occurring repeats in silk fibroin, collagen triplet repeats and mutational hotspots, ancient ferredoxin, coiled coil and leucine zipper patterns, runs of amino acids, protein “huntingtin,” hydrophobic transmembrane helices, implicit heptad repeats in amyloid protein, etc. A heptad scan method is applied to prion proteins that form amyloid through hydrogen bond zippers.