change blue

if not term.isColor() then
  error("its not color please upgrade you pc")
end
term.setBackgroundColor(colors.blue)
term.clear()
term.setBackgroundColor(colors.blue)
term.setTextColor(colors.yellow)
term.setCursorPos(1,1)
print("MineOS 1.3 PRE2")
term.setTextColor(colors.white)
print("This is PreRelease Build")