function fetchPeripheral()
    local names = peripheral.getNames()
    local i, name
    for i, name in pairs(names) do
        if peripheral.getType(name) == "monitor" then
            return peripheral.wrap(name)
        else
            return "FAILED"
        end
    end
end

Positions = {
    "TOP_LEFT",
    "TOP_RIGHT",
    "BOTTOM_LEFT",
    "BOTTOM_RIGHT",
    "CENTER"
}
function writeText(xPos, yPos, bgd_color, txt_color, text, mon)
    mon.setCursorPos(xPos, yPos)
    mon.setBackgroundColor(bgd_color)
    mon.setTextColor(txt_color)
    mon.write(text)
end


function easyWrite(position, bgd_color, txt_color, text, mon)
    xPos, yPos = mon.getSize()
    textLen = string.len(text)
    halfText = textLen / 2
    if position == Positions[5] then
        centerX = xPos/2 - halfText
        centerY = yPos/2
        writeText(centerX, centerY, bgd_color, txt_color, text, mon)
    end
end

function drawBars(color, yPos, mon)
    monX, monY = mon.getSize()
    mon.setBackgroundColor(color)
    mon.setCursorPos(1, yPos)
    mon.write(string.rep(" ", monX))
    mon.setBackgroundColor(colors.black)
end

function clearScreen(ccolor,ecolor, mon)
    mon.setBackgroundColor(ccolor)
    mon.clear()
    mon.setBackgroundColor(ecolor)
end

function toggleRedstone(side)
    if redstone.getOutput(side) then
        redstone.setAnalogOutput(side, 0)
    else
        redstone.setAnalogOutput(side, 15)
    end
end