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I thought you wanted to make your own OS (DEVOS). Why do you need to install OpenOS for that? Thank you for clarifying that my guess of your knowledge about operating systems was correct.

you can also use vt100 codes for color io.write("\27[31m", "hello ", "\27[33m", "world", "\27[m")  

This was exactly what I was looking for. Thanks for your help.

Ok, as promised, here is a more advanced function. Instead of giving it one string and specify its color, you mark parts of the string and specify foreground (and also background) color by using a xml/html like syntax. If you want to change on part of the string, put it between <color fg=hex, bg=hex>your string goes here</color>. Hex is the color code starting with 0x (like 0xFFFFFF). You don't have to specify both, background and foreground, just set the color you like to change; if you set both, use a comma (,) as delimiter. local component = require "component" local term = require "term" ------------------------------------------------------------------------------- local gpu = component.gpu local adWrite = {} function adWrite.write(s) local cbg, cfg = gpu.getBackground(), gpu.getForeground() local i = 1 s:gsub('()<color(.-)>(.-)</color>()', function(i1, tag, content, i2) local bg, fg if not i1 then return end term.write(s:sub(i, i1-1)) tag = tag:gsub('%s', "") -- remove whites paces for colortype, color in tag:gmatch '([bfg][bfg])=(0[xX]%x+)' do if colortype == "bg" and color then bg = tonumber(color) elseif colortype == "fg" and color then fg = tonumber(color) end end if bg and bg ~= cbg then gpu.setBackground(bg) end if fg and fg ~= color then gpu.setForeground(fg) end term.write(content) gpu.setBackground(cbg) gpu.setForeground(cfg) i = i2 end) if i <= #s then term.write(s:sub(i, #s)) end end ------------------------------------------------------------------------------- return adWrite Here is an example:  

yes I do via some P2p tunels bus otherwise yes