CCDisplay

local monitor = peripheral.wrap( "right" )

function writeCentered (dy, text, device)
	local w,h = device.getSize()
	local x = math.floor((w - string.len(text)) / 2)+1
	local y = math.floor(h/2) + dy
	device.setCursorPos(x,y)
	device.clearLine()
	device.write(text)
end

function writeCenteredInLine (y, text, device)
	local w,h = device.getSize()
	local x = math.floor((w - string.len(text)) / 2)+1
	device.setCursorPos(x,y)
	device.clearLine()
	device.write(text)
end

function getTime()

	local time = os.time()
	return textutils.formatTime(time, false)

end

function adjustTextScale(device)

	device.setTextScale(1)
	local w,h = device.getSize()
	local scale = 1
	while w > 12 do
		scale = scale+1
		device.setTextScale(scale)
		w, h = device.getSize()
	end

end

adjustTextScale(monitor)
monitor.setBackgroundColor(colors.black)
monitor.clear()
monitor.setBackgroundColor(colors.black)

while true do

	writeCentered(1,getTime(),monitor)
	sleep(0.1)

end