The Varicode is a kind of Fibonacci code where the boundaries between character codes are marked by two or more consecutive zeros. Like all Fibonacci codes, since no character code contains more than one consecutive zero, the software can easily identify the spaces between characters, regardless of the length of the character. The idle sequence, sent when an operator is not typing, is a continuous sequence of phase-shifts, which do not print on the screen. Martinez arranged the character alphabet so that, as in Morse code, the more frequently occurring characters have the shortest encodings, while rarer characters use longer encodings. He named this encoding scheme "varicode".