Old Bridge Control

monitor = peripheral.wrap("top")
monitor.clear()

-- Gets the redstone state
local function RP()
    return redstone.getInput("left")
end

local function SetClose()
    monitor.setBackgroundColor(colors.red)
    monitor.clear()
    monitor.setTextColor(colors.lime)
    monitor.setCursorPos(1,1)
    monitor.write("Closing...")
    sleep(12)
    monitor.clear()
end

local function SetOpen()
    monitor.setBackgroundColor(colors.red)
    monitor.clear()
    monitor.setTextColor(colors.lime)
    monitor.setCursorPos(1,1)
    monitor.write("Opening...")
    monitor.setCursorPos(1,2)
    monitor.write("Please wait!")
    sleep(12)
    monitor.setBackgroundColor(colors.lime)
    monitor.clear()
end

local lastRS = RP()
        if lastRS then
print("Initial State: Opened")
    monitor.setBackgroundColor(colors.lime)
    monitor.clear()
        else
print("Initial State: Closed")
    monitor.setBackgroundColor(colors.red)
    monitor.clear()
        end

while true do
    local newRS = RP()
    if not newRS == lastRS then
        lastRS = newRS
        if newRS then
print("Now opening...")
            SetOpen()
        else
print("Now closing...")
            SetClose()
        end
    end
    sleep(0.1)
end