[Lua] [Error?] Color problems

For some reason, my monitor doesn't turn blue when I tell it to.
Code:
m = peripheral.wrap("top")
m.write("Meep")
sleep(10)
m.write(".-.")
sleep(10)
m.clear()
m.setBackgroundColor(colors.blue)
sleep(10)
os.shutdown()

NOTE**: It doesn't return any error

Can you even change the background colour of a terminal?

try slowing down the sleeps for testing purposes, to 0.5 maybe.

setBackgroundColor sets the background color for subsequent text. You set it to blue, then don't write anything else. It doesn't magically change the whole screen to blue (which would be extraordinarily annoying). Try adding an m.clear() after it if you're looking to turn the whole background blue.