Smeltery program

    function ChooseMode()
        print("1. Casting d'item\n")
        print("2. Création de blocs\n")
        print("3. Extraction du liquide\n")
        print("4. Tout étéindre")
        -- We print possible choices and ask user which mode he does want
        print("Choix du mode : ")
        local reading = read()
        return reading
    end

    function CastMode( isOn )
        if isOn == true then
            redstone.setOutput("back", false)
        else
            redstone.setOutput("back", true)
        end
        -- Redstone has to be off to activate redstone clock
    end

    function BlockMode(isOn)
        if isOn == true then
            redstone.setOutput("left", false)
        else
            redstone.setOutput("left", true)
        end
        -- Redstone has to be off to activate redstone clock
    end

    function LiquidExtraction( isOn )
        if isOn == true then
            redstone.setOutput("right", true)
        else
            redstone.setOutput("right", false)
        end
        -- Redstone has to be on in order to activate liquid extraction
    end

-- ========================================

while true do
    term.clear()
    term.setCursorPos(1,1)
    local mode = ChooseMode()

    if mode == "1" then
        CastMode(true)
        BlockMode(false)
        LiquidExtraction(false)
    elseif mode == "2" then
        CastMode(false)
        BlockMode(true)
        LiquidExtraction(false)
    elseif mode == "3" then
        CastMode(false)
        BlockMode(false)
        LiquidExtraction(true)
    elseif mode == "4" then
        CastMode(false)
        BlockMode(false)
        LiquidExtraction(false)
    end
end
-- ========================================