function charToColor(code)
	if code == "0" then
		return colors.white
	elseif code == "1" then
		return colors.orange
	elseif code == "2" then
		return colors.magenta
	elseif code == "3" then
		return colors.lightBlue
	elseif code == "4" then
		return colors.yellow
	elseif code == "5" then
		return colors.lime
	elseif code == "6" then
		return colors.pink
	elseif code == "7" then
		return colors.gray
	elseif code == "8" then
		return colors.lightGray
	elseif code == "9" then
		return colors.cyan
	elseif code == "a" then
		return colors.purple
	elseif code == "b" then
		return colors.blue
	elseif code == "c" then
		return colors.brown
	elseif code == "d" then
		return colors.green
	elseif code == "e" then
		return colors.red
	elseif code == "f" then
		return colors.black
	else
		return nil
	end
end

function drawPixel(x,y,color)
	term.setCursorPos(x,y)
	term.setBackgroundColor(color)
	write(" ")
end

function pixel(color,ch)
	term.setBackgroundColor(color)
	write(ch)
end


term.clear()
term.setCursorPos(1,1)

--manual
posY = -1
filename = "block_colors.txt"
net = peripheral.wrap("back")
port = 420

--auto
blockID = {}
colorID = {}
screenSize = 0
if fs.exists(filename) then
	print("file exist loading...")
	sleep(1)

	file = fs.open(filename, "r")
	switch = true
	line = file.readLine()
	while line ~= nil do
			if switch then
				table.insert(blockID,line)
				print("wczytano: " ..line .." do blockID")
				switch = false
			else
				table.insert(colorID,line)
				term.setTextColor(charToColor(line))
				print("wczytano: " ..line .." do colorID")
				term.setTextColor(charToColor("0"))
				switch = true
			end
			line = file.readLine()
	end
	file.close()
	print("file loaded setting screen size...")
	sleep(1)
end

--ustawia rozmiar ekranu
net.open(port)
event, side, port1, port2, msg  = os.pullEvent( "modem_message" )
for i, block in pairs(msg) do
	if block.x > screenSize then
		screenSize = block.x
	end
end
print("screen size: " ..screenSize)
sleep(1)
print("starting scanning!")
sleep(1)


tempBlockID = ""
while true do
	event, side, port1, port2, msg  = os.pullEvent( "modem_message" )
	term.setBackgroundColor(colors.black)
	term.clear()
	for i, block in pairs(msg) do

	  if block.name ~= "minecraft:air" and block.y == posY + 2 then --walls +1
		term.setCursorPos(block.x + screenSize,block.z + screenSize)

		tempBlockID = ""
		for o, line in pairs(blockID) do
			if block.name == blockID[o] then
				tempBlockID = o
			end
		end

		if tempBlockID ~= "" then
			term.setTextColor(colors.black)
			pixel(charToColor(colorID[tempBlockID])," ")
		else
			term.setBackgroundColor(colors.black)
			term.setTextColor(colors.red)
			write("X")
		end

	  elseif block.name ~= "minecraft:air" and block.y == posY + 1 then --walls
		term.setCursorPos(block.x + screenSize,block.z + screenSize)

		tempBlockID = ""
		for o, line in pairs(blockID) do
			if block.name == blockID[o] then
				tempBlockID = o
			end
		end

		if tempBlockID ~= "" then
			term.setTextColor(colors.white)
			pixel(charToColor(colorID[tempBlockID]),"\127")
		else
			term.setBackgroundColor(colors.black)
			term.setTextColor(colors.red)
			write("X")
		end

	  elseif block.name ~= "minecraft:air" and block.y == posY then --floor
		term.setCursorPos(block.x + screenSize,block.z + screenSize)


		for o, line in pairs(blockID) do
			if block.name == blockID[o] then
				tempBlockID = o
			end
		end

		if tempBlockID ~= "" then
			term.setTextColor(colors.gray)
			pixel(charToColor(colorID[tempBlockID]),"\127")
		else
			term.setBackgroundColor(colors.black)
			term.setTextColor(colors.red)
			write("?")
		end

	  elseif block.name ~= "minecraft:air" and block.y == posY - 1 then --evelower
		term.setCursorPos(block.x + screenSize,block.z + screenSize)

		tempBlockID = ""
		for o, line in pairs(blockID) do
			if block.name == blockID[o] then
				tempBlockID = o
			end
		end

		if tempBlockID ~= "" then
			term.setTextColor(colors.black)
			pixel(charToColor(colorID[tempBlockID]),"\127")
		else
			term.setBackgroundColor(colors.black)
			term.setTextColor(colors.red)
			write("\191")
		end

	  elseif block.name ~= "minecraft:air" and block.y == posY - 2 then --evenevenlower
		term.setCursorPos(block.x + screenSize,block.z + screenSize)

		tempBlockID = ""
		for o, line in pairs(blockID) do
			if block.name == blockID[o] then
				tempBlockID = o
			end
		end

		if tempBlockID ~= "" then
			term.setBackgroundColor(colors.black)
			term.setTextColor(charToColor(colorID[tempBlockID]))
			write("\127")
		end

	  end

	end --koniec fora

	--pozycja gracza
		term.setCursorPos(screenSize,screenSize)
		term.setBackgroundColor(term.getBackgroundColor())
		term.setTextColor(colors.red)
		write("\2")
	sleep(0.2)
end