ComputerCraft Elevator ElevatorSide

modemSide = "top"
controlComputerID = 6

callComputerID1 = 28
callComputerID2 = 99
callComputerID3 = 99
callComputerID4 = 99
callComputerID5 = 99
callComputerID6 = 99

rednet.open(modemSide)
function UserInput()
    term.clear()
    term.setCursorPos(1,1)
    outputFloor()
    print("Enter The Floor Number You Want To Go To")
    while true do
        local input = read()

        if input == "1" then
            calculateFloors(1)
            break
        elseif input == "2" then
            calculateFloors(2)
            break
        elseif input == "3" then
            calculateFloors(3)
            break
        elseif input == "4" then
            calculateFloors(4)
            break
        elseif input == "5" then
            calculateFloors(5)
            break
        elseif input == "6" then
            calculateFloors(6)
            break
        elseif input == "DebugUp" then
            rednet.send(controlComputerID, input)
            UserInput()
            break
        elseif input == "DebugDown" then
            rednet.send(controlComputerID, input)
            UserInput()
            break
        end
    end
end

function outputFloor()
    local floorSignal = redstone.getAnalogInput("back")
    if floorSignal ~= 0 then
        rednet.send(callComputerID1, floorSignal)
        rednet.send(callComputerID2, floorSignal)
        rednet.send(callComputerID3, floorSignal)
        rednet.send(callComputerID4, floorSignal)
        rednet.send(callComputerID5, floorSignal)
        rednet.send(callComputerID6, floorSignal)
    end
end

function calculateFloors(desiredFloor)
    local floorDifference = getCurrentFloor() - desiredFloor
    if floorDifference == 0 then
        UserInput()
    end
    rednet.send(controlComputerID, floorDifference)
    UserInput()
end

function getCurrentFloor()
    local signal = redstone.getAnalogInput("back")
    if signal == 0 then
        print("Not Currently On A Floor. Type DebugUp Or DebugDown To Move Up Or Down One Block")
        os.sleep(5)
        UserInput()
    else
        return signal
    end
end

UserInput()