const byte black = 0
const byte white = $71
const byte red = $22
const byte cyan = $43
const byte purple = $24
const byte green  = $35
const byte blue = $16
const byte yellow = $57
const byte orange = $28
const byte brown = $19
const byte light_red = $32
const byte dark_grey = $21
const byte dark_gray = $21
const byte medium_grey = $31
const byte medium gray = $31
const byte light_green = $55
const byte light_blue = $36
const byte light_grey = $41
const byte light_gray = $41