d = ""
line = 6
--try to find the root

if     fs.exists("/BlahOS") then d = ""
elseif fs.exists("disk/BlahOS") then d = "disk"
elseif fs.exists("disk2/BlahOS") then d = "disk2"
elseif fs.exists("disk3/BlahOS") then d = "disk3"
elseif fs.exists("disk4/BlahOS") then d = "disk4"
elseif fs.exists("disk5/BlahOS") then d = "disk5"
elseif fs.exists("disk6/BlahOS") then d = "disk6"
end
-------
os.loadAPI(d.."/BlahOS/screen")

title = {}
title[1] = " __         __  __                    "
title[2] = "|__)| _ |_ /  \\(_   . _  _|_ _ || _ _ "
title[3] = "|__)|(_|| )\\__/__)  || )_)|_(_|||(-|  "

writeLine = function(s)

 term.setCursorPos(3, line)
 line = line + 1
 if line == screen.sizeY then line = screen.sizeY - 1 end
 print(s)

 term.setCursorPos(3 + string.len(s), line - 1)
 --screen.border(false)
end


term.clear()
term.setCursorPos(1,1)
screen.border(false)
for i = 1, table.getn(title) do
 term.setCursorPos(3, i + 1)
 term.write(title[i])
end

writeLine("Press enter to install Blah OS ")
writeLine("or hold ctrl + T to cancle.")
read()
screen.border(false)
line = 2
writeLine("Finding/deleting older versions")


if not fs.exists("/BlahOS") and not fs.exists("/Software") and not fs.exists("startup") then
 writeLine(" -Found none")
end

if fs.exists("/BlahOS") then
 writeLine(" -Deleting \"/BlahOS/\"")
 fs.delete("/BlahOS")
 write("[DONE]")
end
if fs.exists("/Software") then
 writeLine(" -Deleting \"/Software/\"")
 fs.delete("/Software")
 write("[DONE]")
end
if fs.exists("startup") then
 writeLine(" -Deleting \"startup\"")
 fs.delete("startup")
 write("[DONE]")
end
if fs.exists("help") then
 writeLine(" -Deleting \"help\"")
 fs.delete("help")
 write("[DONE]")
end
writeLine("")
writeLine("Checking data source")
if     fs.exists("/BlahOS") then d = ""
elseif fs.exists("disk/BlahOS") then d = "disk"
elseif fs.exists("disk2/BlahOS") then d = "disk2"
elseif fs.exists("disk3/BlahOS") then d = "disk3"
elseif fs.exists("disk4/BlahOS") then d = "disk4"
elseif fs.exists("disk5/BlahOS") then d = "disk5"
elseif fs.exists("disk6/BlahOS") then d = "disk6"
end
write("[DONE]")

writeLine("")
writeLine("Copying files")
fs.copy(d.."/BlahOS/", "BlahOS")
fs.copy(d.."/help", "help")
fs.copy(d.."/startup", "startup")
fs.copy(d.."/Software", "Software")
write("[DONE]")

writeLine("")
writeLine("Please remove the instalation disk")
while fs.exists(d.."/BlahOS") do sleep(1) end
write("[DONE]")

writeLine("")
writeLine("Rebooting system in 5")
sleep(1)
writeLine("Rebooting system in 4")
sleep(1)
writeLine("Rebooting system in 3")
sleep(1)
writeLine("Rebooting system in 2")
sleep(1)
writeLine("Rebooting system in 1")
sleep(1)
writeLine("Rebooting system in 0")
sleep(0.3)
os.reboot()