debugging

local function txt(x,y,t,c,b)
    if not c then c = colors.white end
    if not b then b = colors.black end
    term.setCursorPos(x,y)
    term.setTextColor(c)
    term.setBackgroundColor(b)
    write(t)
    term.setTextColor(colors.white)
    term.setBackgroundColor(colors.black)
end

local function debug(x,y,t,c,b)
    if not c then c = colors.red end
    if not b then b = colors.white end
    txt(x,y,"Debug: "..t,c,b)
    read()
end

local function addToFile(name,str)
    local h = fs.open(name, fs.exists(name) and "a" or "w")
    h.write(str)
    h.close()
end

local function overWrite(name,str)
    local h = fs.open(name, "w")
    h.write(str)
    h.close()
end

return {
    txt = txt,
    debug = debug,
    addToFile = addToFile,
    overWrite = overWrite
}