Volcano Pump Display

-- Monitor must be to the right
-- Requires 1x2 Monitor for correct display
local out = peripheral.wrap("right")

local running = true
local firstrun = true
local isPumping = false

while running do

    if not firstrun then
        os.pullEvent("redstone")
    else
        firstrun = false
    end

    if rs.getInput("right") then
        out.clear()
        out.setCursorPos(1,1)
        out.write("RESTARTING")
        sleep(2)
        os.reboot()
    end

    out.clear()
    out.setCursorPos(1,1)
    out.write("~~ Pump Status ~~")

    -- redstone "sensors" input to specific sides

    -- redstone signal indicating pump is turned of by user
    local pumpEnabled = rs.getInput("back")

    -- redstone signal indicating reserve tank is full (at ~95% capacity)
    local tankFull = rs.getInput("bottom")

    -- redstone signal indicating reserve tank is empty
    local tankEmpty = rs.getInput("front")

    -- ~~ Pump Shutoff System ~~
    -- pump shuts off when tank is full (~95%)
    -- pump starts when tank is empty

    if tankFull and isPumping then
        isPumping = false
    end

    if tankEmpty and not isPumping then
        if pumpEnabled then
            isPumping = true
        end
    end

    rs.setOutput("top", isPumping)

    out.setCursorPos(1,2)

    if pumpEnabled then
        out.setBackgroundColor(colors.lime)
        out.setTextColor(colors.black)
        out.write("Pump Online       ")
    else
        out.setBackgroundColor(colors.red)
        out.setTextColor(colors.white)
        out.write("Pump Offline      ")
    end

    out.setBackgroundColor(colors.black)
    out.setTextColor(colors.white)

    out.setCursorPos(1,3)

    if tankFull and not tankEmpty then
        out.setBackgroundColor(colors.lime)
        out.setTextColor(colors.black)
        out.write("Tank Full         ")
    elseif not tankFull and not tankEmpty then
        out.setBackgroundColor(colors.yellow)
        out.setTextColor(colors.black)
        if isPumping then
            out.write("Tank Filling      ")
        else
            out.write("Tank Draining     ")
        end
    elseif not tankFull and tankEmpty then
        out.setBackgroundColor(colors.red)
        out.setTextColor(colors.white)
        out.write("Tank Empty        ")
    end

    out.setCursorPos(1,4)

    if isPumping then
        out.setBackgroundColor(colors.lime)
        out.setTextColor(colors.black)
        out.write("   - PUMPING -    ")
    else
        out.setBackgroundColor(colors.yellow)
        out.setTextColor(colors.black)
        out.write("  - PUMP  IDLE -  ")
    end

    out.setBackgroundColor(colors.black)
    out.setTextColor(colors.white)

    sleep(1)
end