manual cable switch

--- manual cable switch by elektrobom1---
local cable = "back"
local cables = {
    colors.white,
    colors.orange,
    colors.yellow
}
-----------------------------------------
local b = require("button")
local ffs = {}
for i = 1, #cables do
    ffs[i] = false
end
local function ff(num)
    ffs[num] = not ffs[num]
end
while true do
    local rec = tonumber(read())
    if type(rec) == "number" and rec <= #cables then
        ff(rec)
        b.bundle(side, cables[rec], ffs[rec])
    end
end