CC timer

-- shell.run("timer")
local tick = 0
local backOutputColor = 0
local firstTime = true

while true do
    if not rs.getInput("front") then
        if firstTime then
            print("------------")
            print("Timer Active")
            print("------------")
            firstTime = false
        end

        -- Timers for back output.
        backOutputColor = 0

        if tick ~= 0 then
            -- Pulse every:
            -- 1/10 Second
            if math.fmod(tick, 2) == 0 then
                backOutputColor = backOutputColor + colors.white
            end

            -- 1/2 Second
            if math.fmod(tick, 5) == 0 then
                backOutputColor = backOutputColor + colors.orange
            end

            -- 1 Second
            if math.fmod(tick, 10) == 0 then
                backOutputColor = backOutputColor + colors.magenta
            end

            -- 2 Second
            if math.fmod(tick, 20) == 0 then
                backOutputColor = backOutputColor + colors.lightBlue
            end

            -- 3 Second
            if math.fmod(tick, 30) == 0 then
                backOutputColor = backOutputColor + colors.yellow
            end

            -- 4 Second
            if math.fmod(tick, 40) == 0 then
                backOutputColor = backOutputColor + colors.lime
            end

            -- 5 Second
            if math.fmod(tick, 50) == 0 then
                backOutputColor = backOutputColor + colors.pink
            end

            -- 10 Second
            if math.fmod(tick, 100) == 0 then
                backOutputColor = backOutputColor + colors.gray
            end

            -- 20 Second
            if math.fmod(tick, 200) == 0 then
                backOutputColor = backOutputColor + colors.lightGray
            end

            -- 30 Second
            if math.fmod(tick, 300) == 0 then
                backOutputColor = backOutputColor + colors.cyan
            end

            -- 1 Minute
            if math.fmod(tick, 600) == 0 then
                backOutputColor = backOutputColor + colors.purple
            end

            -- 5 Minute
            if math.fmod(tick, 3000) == 0 then
                backOutputColor = backOutputColor + colors.blue
            end

            -- 10 Minute
            if math.fmod(tick, 6000) == 0 then
                print("10 Minutes Complete.")
                backOutputColor = backOutputColor + colors.brown
            end

            -- 20 Minute
            if math.fmod(tick, 12000) == 0 then
                backOutputColor = backOutputColor + colors.green
            end

            -- 30 Minute
            if math.fmod(tick, 18000) == 0 then
                backOutputColor = backOutputColor + colors.red
            end

            -- 1 Hour
            if math.fmod(tick, 36000) == 0 then
                print("1 Hour Complete")
                backOutputColor = backOutputColor + colors.black
            end
        end

        -- Set Bundled Cable backoutput
        redstone.setBundledOutput("back", backOutputColor)

        -- Add timers for bundled output to any other side.

        -- Base time interval (1/10 second) == 1 Redstone tick == 2 Game Ticks
        sleep(.1)

        -- Reset tick count in case there is a max int size
        if tick == 36000 then
            tick = 0
        end
        tick = tick + 1
    else
        term.clear()
        term.setCursorPos(1,1)
        timerOutput("back", 0)
        print("Timer Disabled, Redstone Low in front to enable.")
        os.pullEvent("redstone")
        if not rs.getInput("front") then
            firstTime = true
            tick = 0
        end
    end
end

-- Colors API Cheat Sheet
--[[
colors.white
colors.orange
colors.magenta
colors.lightBlue
colors.yellow
colors.lime
colors.pink
colors.gray
colors.lightGray
colors.cyan
colors.purple
colors.blue
colors.brown
colors.green
colors.red
colors.black
]]--