Help With My Gui Plzz

Hi i was wandering if any one could take a look and tell me why i keep getting the error paintutils:92: attempt to get length of nil
plzz i need this so i can start my os

--desktop
function titleBar()
term.setCursorPos(1,1)
term.setBackgroundColor(colors.orange)
term.setTextColor(colors.black)
term.clearLine()
term.setCursorPos(3,1)
print("Start")
end
function drawDesktop()
term.setBackgroundColor(colors.white)
term.clear()
titleBar()
desktopBG = paintutils.loadImage("DesktopBG")
paintutils.drawImage(desktopBG,1,1)
end
drawDesktop()

the file /DesktopBG did not exist. please create one.

it does exitst but its in a custom dir

Then tell it what directory it's in say its in img you'll need to put

desktopBG = paintutils.loadImage("img/DesktopBG")

it worked thanks for everything mostly Last1Here